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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => Project Custom Motobricks => Topic started by: NickHeijman on August 02, 2016, 04:55:44 PM

Title: K75S caferacer project - Hedgehog [Finished]
Post by: NickHeijman on August 02, 2016, 04:55:44 PM
Hi Guys ! (and girls if there are any here  :eek:)

I'm new to the forum as a member but checking around for a while now, looking to some cafe racer projects and it convinced me to get a BRICK myself. I just bought my first bike and what kind of bike. A BMW K75S ex 1989 :bmwsmile !!!

During this year I got my licence to ride a heavy bike (24jrs +) I mean overhere you can have be 24+ or take a second exam after you got 2 years+ driving experience. Welcome to the Netherlands :) anyways I got one and now I got a bike.
I was looking around for a year now to get a base for the caferacer, looking at some Honda, Kawasaki and Yamaha bike's. I saw so many good looking CR's (cafe racers) but the BMW got my attention. The look and feel of driving this bike is amazing together with the quality of the bike it's amazing.


In a few months I will start doing the job to make a CR of it with. Just starting this topic to introduce myself and drop my bike on the before and making updates with pictures during the project.

Picture of the BRICK:

see below attachments :deal:

Inspiration bikes:
(http://thumbsnap.com/i/P5a7dC3w.jpg)
(http://www.motobrick.com/index.php?action=dlattach;topic=5049.0;attach=9392;image)
(http://www.bskspeedworks.co.uk/img/pictures/K100_49_TT_66.jpg)

My questions: ( I know where to find the search button )

Will get back at ya !

Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: TrueAce on August 02, 2016, 07:40:17 PM
Nick, you have picked some fine inspiration..........good luck on your journey. Plenty of folks here have travelled that path and can help you. Be sure to research the Liebrary on........related topics before asking. How about a pictorial on your bike before you start conversion?
And educate us about the age requirements of heavy & non-heavy motorcycles ........24 seems a little old for driving restrictions, how do they enforce folks riding big cc's?
Title: Re: K75S caferacer project - Hedgehog
Post by: Laitch on August 02, 2016, 07:50:48 PM
. . . how do they enforce folks riding big cc's?
If they don't do what they're told , they get spanked, Ace.
Title: Re: K75S caferacer project - Hedgehog
Post by: TrueAce on August 02, 2016, 10:32:01 PM
Latch...........You were more real when we could see your  bearded face staring at the atlas, contemplating your next two hour ride to the four corners of Vermont, but now with your back turned from the camera, staring forlornly toward Labrador, you seem to be drifting away. Latch, come back, Laitch, don't leave us!
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 03, 2016, 02:55:30 AM
Hi Ace, thanks !

Let me explain al little.

Licence A1 (11kW) 18 t/m 19 jr Minimum age 18Jr (max 125cc, 11kW & 0,1kW/kg.)
Licence A2 (35kW) 20 t/m 23 jr Minimum age 20 jaar or minimal 2 jr licence A1 (max 35kW & 0,2kW/kg.)
Licence A (no ristriction) 22-24 jr Minimum age 22 jr + minimal 2 jr licence A2 OR age 24+ then you can get the licence A in once. (like I did)
 
Back on topic, later on this week I will post a pic of my new buddy :) it;s all rainy here pleh  :falldown:


Cheers, Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: TrueAce on August 03, 2016, 11:04:11 AM
Had no idea the regulations were that restrictive. Bet license, registration, taxes, insurance are a bunch! Pretty soon only old people will afford big bikes.
Title: Re: K75S caferacer project - Hedgehog
Post by: TrueAce on August 03, 2016, 11:04:45 AM
Had no idea the regulations were that restrictive. Bet license, registration, taxes, insurance are a bunch! Pretty soon only old people will afford big bikes.
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 03, 2016, 11:13:59 AM
Pretty soon only old people will afford big bikes.

Hahahahaha ! No Ace, your wrong. Getting the licence is a bit messed up as I see it.
But a lot of youngsters above 24Jr drive a big bike ghehehe.

Anyways, check out my Original post. What do you think of it by updating all and adding some main questions to it so people can share some of their idea's. I know that I can search around but it's just for people who are intresting to share some  :lets-eat:

Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: TrueAce on August 03, 2016, 12:58:24 PM
Start out with specific ideas or modification you want to consider, you may get more input if you are specific on the topic. As for "how do I fiddly, do your research before asking others, that looks lazy.
Title: Re: K75S caferacer project - Hedgehog
Post by: Laitch on August 03, 2016, 05:48:28 PM
Had no idea the regulations were that restrictive. Bet license, registration, taxes, insurance are a bunch!
They've legalized prostitution and marijuana over there to ease the pain of bike ownership, Ace.

Anyway, Cafe4Racer is a vendor dedicated to cafe bike parts, Nick, and these pages (http://cafe4racer.eu/en/24-bmw-k75-100-1100) are dedicated to K-bikes. At least one member here, Macgyver, has ordered from them and he seemed satisfied (http://www.motobrick.com/index.php/topic,8503.msg65978.html#msg65978).
Title: Re: K75S caferacer project - Hedgehog
Post by: TrueAce on August 03, 2016, 06:57:58 PM
Yeah, maybe Laitch, but to stay stoned from 16 until 24 to overcome lack of access to big c.c. bikes just sorta wouldn't have worked for me back in the day...........I have always been compulsive when it comes to my compulsions. Just sayins I think there must be a bunch of go-fasters riding above their legal limit and getting away with it. Now those stories of flagrant violation of the motorcycle regulations would be real interesting. You know, you just don't think of those Dutch folks being rebel bikers. Although I met a Netherland dude,about 50, at a campground at Yellowstone who was very proud of his Victory Ace and restored '65 Mustang. Imagine our  conversation as I argued the superiority of BMW's over Victory's.
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 04, 2016, 08:48:14 AM
Thank you Laitch, Ace, for the kind reply.

Yeah I will search the forum bottom/down to look for any solution I can't figure out my own.
Also realy like to hook-up with some topic's of fellow builders.

Hahahaha yeah we got POT on each streetcorner or coffeeshop, regarding the lady's I mean happy that there is such a service but not a complete fan of it. A lot of woman are pushed and beaten down to do such a job as that, on the other hand I think it will keep a lot of sexual abuse out of our country.

Anyways, back on topic. The weather is getting better and after a good wash this Saturday I will drop some pics of the BMW's beautiful iron BRICK.

Cheers guys,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: jc55 on August 05, 2016, 03:16:37 PM
Nick, to answer your question on riding double, I saw the answer(in my opinion) on the internet lately. It was a bike that was a CF with a removable tail. When you removed the tail, there was an additional seat pad that bolted in place. It then looked like a scrambler.

Obviously, you couldn't stash electronics in the tail, but it was ingenious.

Personally, I like modular options. I always thought it would be cool to build an entire 'kit' for a bike so that you could change the entire look and color in 20 minutes by swapping bars, seats, tank, plastics, even wheels with different tires already mounted.

But I'm sort of weird like that  :2thumbup:
Title: Re: K75S caferacer project - Hedgehog
Post by: jc55 on August 05, 2016, 03:23:17 PM
Here it is...
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 07, 2016, 11:27:03 AM
Thanks jc55 !

Will look into it :)

Attached to the original post a picture of the lady !

In a couple of weeks:
Starting with strap-ons
Round headlight with clips on the fork

Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 10, 2016, 01:19:41 PM
Hi guys,

Well a small update post from the beautiful Dobrovnik, Croatie. I'm on holiday with the girl. Yaah. Unfortunately not on the bike :(

I bought some parts, strap-ons 41mm black, headlight with turn lights in it. What do you guys think? and a taillight with licenceplate holder.

Attached the pics.

Cheers Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: Revrdmark on August 10, 2016, 08:47:48 PM
Like the tail light and strap-ons's ( do they have two tightening bolts ? Usually factory strap-ons's have a peg and socket to hold them in place. With out it single bolt clamps tend to turn and rotate on the forks. A lesson that scared the hell out of me on the track on an old SV1000 I used to ride !

Not a fan of the LED turn signal head light. I have visited enough friends in hospitals cause cars pull in front of them or didn't know they were turning cause they trimmed their signals or put flush mount ones on. I'm sure they are plenty bright but when they are only 5" apart it can be hard to tell which side is flashing. I'm just a grumpy old man about stuff like that :-). All my bikes have LED turn signals mounted so everyone knows I'm turning. Your milage may vary :-)


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Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 11, 2016, 02:56:53 PM
Reverdmark,

The strap-ons have 2 bolts and cnc machined to 41mm to fit the K-bikes. I could imagine that using only 1 bolt will get faulty once.

Regarding the headlight, it's just a start. I'm also not sure about it but it is worth the try in my opinion. Well see what happens on the road. I got a bunch a friend who would love to test out in dark it will be clear to see which direction i'm tending.

Will keep you guys posted about the other upcomming items. For now I will keep chilling out in Dubrovnik. Sun sun sun!

Cheers Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 16, 2016, 03:13:24 AM
Hi guys,

Yesterday I started the teardown of the K75S . This week cleaning the fork and lowering it is on the agenda. Also ordering a new flexible front brake cable to arrange the strap-ons will be done.

For now I moved the contactlock to the side. I think I will make a nice mounth for it and leave it there. Looks cool to me :)

Regarding my tank, when I take it of to store it for a couple of weeks. Should I leave the fuel in it or make it empty?

Cheers,
Nick(http://uploads.tapatalk-cdn.com/20160816/a9c05a009d61d333a3bb4d1b285790d2.jpg)(http://uploads.tapatalk-cdn.com/20160816/321a7e22d7b03129d9765138481380f9.jpg)(http://uploads.tapatalk-cdn.com/20160816/010d1d537a113cdde41c423475b2b049.jpg)(http://uploads.tapatalk-cdn.com/20160816/67c9738a28946157dc03759ae020b90d.jpg)(http://uploads.tapatalk-cdn.com/20160816/0f28a231c43eacd305f907022d07885e.jpg)(http://uploads.tapatalk-cdn.com/20160816/522f48b58ab477e0dc3be9db1f0c2f65.jpg)


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Title: Re: K75S caferacer project - Hedgehog
Post by: TrueAce on August 16, 2016, 09:26:27 AM
Use a syphon pump to drain the safely.e tank into an approved gas container. If the fuel is old, dispose safely.
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 16, 2016, 10:44:52 AM
Thanks ace,

The fuel is fresh, I drove the bike 2 days ago for the last time and the fuel is like 1 week old.
Tomorrow I will bring the tank to my work we have a workshop where I can get rid of the "eyes" left and right of the tank and blast sand the tank.

Update's of all will follow.

Does any one has expireance with separate (open) air filters on the intake ?

Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: Martin on August 16, 2016, 04:12:30 PM
Sand blasting may be too harsh, be careful when you blast the tank as it is only aluminium.
Regards Martin.
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 16, 2016, 05:29:13 PM
Thanks Martin,

I'm aware of it, we got glass pearls dry as blasting grid. Also we can adjust the pressure (will use 1,5 - 2 bar)

Here are some picture of the teardown of the tank, air filter, carbs and also I took out the grip heater.

Regarding the air intake, I will make a 90 degree turn on the carbs with a RVS pipe and mount 3 individual K&N open air filters on them. Looks awesome + the sound  :yow

For now, cleaning, cleaning and cleaning.

Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: Martin on August 16, 2016, 05:51:16 PM
I am  slightly confused, it sounds like you are replacing the throttle bodies with carburetors, if so what carburetors are you going to use, and I presume you will remove the fuel injectors. If you are just replacing the filter with three K&N filters where are you going to fit the air flow meter? :dunno
Regards Martin.
Title: Re: K75S caferacer project - Hedgehog
Post by: Laitch on August 16, 2016, 08:34:08 PM
Regarding the air intake, I will make a 90 degree turn on the carbs with a RVS pipe and mount 3 individual K&N open air filters on them. Looks awesome + the sound  :yow
Nick, you should consider studying how your bike works and what you call its parts so the rest of us will be able to understand what you are doing—no carbs on your K75. Go to Vogel's troubleshooting page (http://hrsbstaff.ednet.ns.ca/bvogel/K100/download/bike-wont-start1.htm), scroll past the troubleshooting chart and read about how the various parts work with each other. Your 90º rotation air intake scheme will not work the way you intend unless you include the air flow sensor in it. After you have read Vogel's explanation of the components, here are two more posts to read.
1. This one from rbm is about the air flow sensor limitations to modification (http://www.motobrick.com/index.php/topic,7253.msg50151.html#msg50151).
2. This one is how Chaos used a single pod filter to modify his bike (http://www.motobrick.com/index.php/topic,8555.msg65947.html#msg65947).
Title: Re: K75S caferacer project - Hedgehog
Post by: billday on August 16, 2016, 09:38:53 PM
I don't know how much of this I can take.
Title: Re: K75S caferacer project - Hedgehog
Post by: TrueAce on August 16, 2016, 10:48:38 PM
There maybe some confusion about velocity air stacks because of some custom early motor K-bikes pics floating around which appear to have them. There are several project bikes which have used a single stack filter.
Title: Re: K75S caferacer project - Hedgehog
Post by: Laitch on August 17, 2016, 12:22:02 AM
I don't know how much of this I can take.
We're all here to help you find out, bill.  :hehehe
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 17, 2016, 06:43:40 AM
I am  slightly confused, it sounds like you are replacing the throttle bodies with carburetors, if so what carburetors are you going to use, and I presume you will remove the fuel injectors. If you are just replacing the filter with three K&N filters where are you going to fit the air flow meter? :dunno
Regards Martin.

Hi Martin,

I looked up the internet and your correct, they called throttle body. My mistake.
I'm learning on the go, looking up thing and in the meantime i'm cleaning and cleaning.

@ Laitch & True Ace.

What about this bike then ?
http://www.pipeburn.com/home/2014/09/29/bmw-k-series-bell-kaff.html
Cannot find a propper discription of what they did to make it work without the air flow meter.

And this guy is just leaving the air flow meter out and testing with the flow.
http://www.k100-forum.com/t8933p50-big-block-k100
Quote"
may have to do similar  with the porting I have done

small bores flow well up high but big bores need a little more  length to stretch the induction stroke lower down in the rev range ...we already have the length and reduced size in the exhaust headers on the 2 valve models ...but have to do something with the intake I recon .
"

Furthermore I know I need to learn a lot and read a lot. So please correct me if i'm wrong :)

Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 17, 2016, 06:45:45 AM
And here we go with the tank.

Using 3,5 bar, the paint is ready hard so I have to be very patient to get all off properly.

See attached:
(http://uploads.tapatalk-cdn.com/20160817/cdf15fe004d92fa3c5b5cbbdd9aedd10.jpg)(http://uploads.tapatalk-cdn.com/20160817/29e575f6fe42090bd07e8b0706754af6.jpg)

Cheers,
Nick


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Title: K75S caferacer project - Hedgehog
Post by: Revrdmark on August 17, 2016, 10:44:59 AM
On my last cafe build I used "orange stripper"  to strip the fuel tank. It works great  you just "glob it on" and let it sit and bubble the paint off. It's made from orange oil but won't take your skin off wreck your clothes or kill brain cells like the old furniture stripper/naipalm stuff I used to use. It smells like orange juice and cleans up with water.


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Title: Re: K75S caferacer project - Hedgehog
Post by: Laitch on August 17, 2016, 10:55:54 AM
@ Laitch & True Ace.
What about this bike then ?
And this guy is just leaving the air flow meter out and testing with the flow.
Neither of those engines is a K75, Nick. What you missed reading in that thread are these two posts
This was a question about the air flow meter (http://www.k100-forum.com/t8933p50-big-block-k100#115857).
This was the response (http://www.k100-forum.com/t8933p50-big-block-k100#115860).

You should consider that when you don't seem to understand the differences between a carburated fuel system and fuel injection, or between one engine model and another, you probably will get some comments that don't make sense to you, or make statements that don't make sense to others. All the information you need to understand the differences is online already. It just takes patience to read them carefully—you seem to have patience. A simple way to see basic component differences is go to the MAX BMW parts fiche (http://www.maxbmwmotorcycles.com/fiche/PartsFiche.aspx) and look at the fuel preparation and other diagrams of the different models.

You seemed determined to make a great project out of this bike so you probably will. Good luck with it.
Title: K75S caferacer project - Hedgehog
Post by: Revrdmark on August 17, 2016, 11:30:51 AM
I hesitate to pipe in cause I am new to this bike myself and figuring it out as I go like you.

Two things. 1) this is my 4th cafe build and although pod filters look cool they are a PITA but that has been my experience with normal aspirated carbs. The rejetting and headache of getting a bike to run right made it easier for me to find a creative way to hide or relocate a stock air box. This is my first fuel injected project so I'll defer to those who know whether the "pool" of calm air a stock air box creates makes a difference for FI engines ( my inclination is it doesn't since you are not atomizing fuel with airflow and such like in carbs ???)

2) as I work on my K100 it seems there are two boxes. One with the air scoop and filter on the right side, and a big collection box (or whatever BMW calls it) on the left with the mass airflow sensor between the two. I have seen ... Somewhere (on this forum???) ... that someone turned the "collection box" 180 degrees so the MAS is on the out side of the bike with a 90 degree tube. ( kinda looked like the V-twin filters on early Buells) You could fabricate a smaller box with the pod filters and an opening for the MAS. But some how you would have to get the MAS behind the filters to get clean air  to it. Or maybe one big pod connected to the MAS like this

https://upload.wikimedia.org/wikipedia/commons/1/1b/Buell_M2_Cyclone_white_2000_front.jpg

Your milage may vary :-) just thinking out loud


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Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 17, 2016, 04:18:34 PM
Hee Revrdmark,

Thanks for you kind reply, in the first time I wasn't aware of the FI system because i saw the other bikes first before I took all apart.
For now I will leave the stock air box and so for what it is and focus on the rest. But the idea which you send of the air filter 90 degrees would be a option for later on.

PS: This bike has also a different air filter. https://www.youtube.com/watch?v=akyQ4nW0KEY

Tomorrow I will finish sanding the tank and go to the paint shop to get a nice mat black hard paint of the tank and the wheels.

And also again do a lot of cleaning the frame and parts. Hopefully my parts will arrive soon to finish the front fork. After that the rear and exhaust are up the agenda.

Again thanks !

Cheers Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: rbm on August 17, 2016, 04:38:49 PM
The Pipeburn link to the Bell Kaff shows a highly highly modified K1100 frame strapped to a K1200 motor with a K1200 transmission and customised rear.  The early K1200s use Bosch Motronic  fuel injection.  Thus, the Bell Kaff can use velocity stacks since there is no air flow meter as in a Jetronic.  If you want to read more about Larry's bikes, especially this one, then go to his site - www.specialks.net - and click on the Media link.
Title: Re: K75S caferacer project - Hedgehog
Post by: TrueAce on August 17, 2016, 05:06:20 PM
I recall a project bike from Alaska that placed a single cone filter off the back under the seat using a custom housing to hold the AFM, and using a lithium battery to replace stock so the space would be freed. Many folks strive for that open look by going to a lithium. What are you doing with the battery? I left the air box alone just for simplicity, but did ditch the snorkel.
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 18, 2016, 01:44:01 AM
Hi Ace,

Looks good !! Also you took off the "eyes" from the tank. (I dont know how to call them) most people leave them on even when they do a paint job.

The snorkel is off for now, I'm placing a mesh gasket where the snorkel schould be.

For the battery I want a really small one but not sure where to place it. I'm making a bike with a double seat to get the GF with me so I dont have space to get it in the seat. But I will figure something out.

Regarding the footpegs you just cut them off to a single one?

Cheers,
Nick


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Title: Re: K75S caferacer project - Hedgehog
Post by: TrueAce on August 18, 2016, 09:33:58 AM
Correct, and cut down the seat pan, but you could configure for a passenger, just don't cut too much off the rear subframe. My battery is lithium hidden in the modified relay box, after removing superfluous relays......tight squeeze. And yes all good builds should eliminate the useless tank eyes! Keep the pics coming.
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 18, 2016, 09:40:49 AM
Oh yeah I think I will cut off some off the foot pegs. Regardingt removing the relays. Could you advise me, because it sounds like the best option so far _o_

Here are some pic's of the tank, sand blasted. I kept the original paint on the bottom because this paint is really hard and good. Therefor no one would see it because the tank will be painted completely.

Taking of the eyes and so of the tank will be done later on.

Cheers,
Nick(http://uploads.tapatalk-cdn.com/20160818/97223394c463215eadee6e1b84e452df.jpg)(http://uploads.tapatalk-cdn.com/20160818/d76a9e00e0943b1de62d41bbfae9eef6.jpg)(http://uploads.tapatalk-cdn.com/20160818/d5b420739d06b60b3252c9748ac57e97.jpg)(http://uploads.tapatalk-cdn.com/20160818/7c33e04c2894669ea7ecf42d4077fcd3.jpg)(http://uploads.tapatalk-cdn.com/20160818/19360bdd2f8cd8a4c2cd107b2848acda.jpg)(http://uploads.tapatalk-cdn.com/20160818/34267a3bcfebfbb85edd5a2c2c4b47ff.jpg)


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Title: Re: K75S caferacer project - Hedgehog
Post by: TrueAce on August 18, 2016, 09:55:47 AM
Good job on your tank. I used a chemical remover that got 80% and then lots of wet sanding. Be sure to insulate the bottom of the tank from the engine heat. On the relays, because my bike is a scrambler, I did not keep turn signals, horn, flasher, load shed,etc that were not essential, thereby freeing up space for the lithium. Very tight squeeze. Instead, you might mount a small box for a lithium where the stock.big battery sits, most folks won't notice it laying on its side, way easier than the relay box. Be very careful with cutting off your tank eyes, used a dremel.on mine
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 18, 2016, 10:03:21 AM
Thanks !

Well when I didn't got the option to sand blast the paint of I would do it the same.
Ah a scambler, in my case I need to keep the signal lights, horn, flash etc.. so thats not a option. I think I will go for a very small flat battery to fit under the new seat max hight 5-7cm. I will search the i-net and post some battery's up here.

Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 18, 2016, 12:26:07 PM
Hi guys,

Today I tried to put back the fuel "bar/rail" but cant get it done :(

I put grease on the injector top o-rings and inside the cups but cant get them on. I mean I dont want to force anything or brake the injectors.

Any tips or tricks

Cheers,
Nick
(http://uploads.tapatalk-cdn.com/20160818/3bfd339ec5b7d0673459067d2d2d9f0d.jpg)


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Title: Re: K75S caferacer project - Hedgehog
Post by: billday on August 18, 2016, 12:38:34 PM
You did it backwards. Install the injectors onto the rail, then install the rail + injectors into the engine.
Title: Re: K75S caferacer project - Hedgehog
Post by: rbm on August 18, 2016, 01:35:18 PM
Don't forget to blow out the injector recesses with compressed air and clean up any debris before removing the injectors from the block.  You don't want road grit and rocks in your intake system.
Title: Re: K75S caferacer project - Hedgehog
Post by: Revrdmark on August 18, 2016, 05:05:05 PM
You did it backwards. Install the injectors onto the rail, then install the rail + injectors into the engine.
 
I had same issue. Much easier with them attached to the rail and putting all 4 in. I also sprayed the rubber o rings with WD-40 made them slick and "pop" into the sockets much easier. The WD-40 will evaporate but even if you get it in combustion chamber it won't hurt anything just smoke a bit for a while.


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Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 18, 2016, 05:09:33 PM
Great thanks guys I will try that.

How to get the injectors out properly, I tried to pull them out but I think a need a quite force to do it?
Maybe there is some under pressure in the chamber during the compression or so

Thanks a lot

cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: rbm on August 18, 2016, 06:02:25 PM
It can sometimes take force to extract them.  They are only held in place with O-rings, similar to the ones you can see on the tops of the injectors.  Try a little more force inline with the injector; it's possible its age and the O-ring is just very stuck.
Title: Re: K75S caferacer project - Hedgehog
Post by: Laitch on August 18, 2016, 07:29:39 PM
It can sometimes take force to extract them.
Call on some friends to hold down the bike, Nick, and have a party doing it!
https://www.youtube.com/watch?v=m5s7J-Elq7A
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 19, 2016, 03:41:03 AM
Hahahahahahaha Laitch, you'v made my day for so far.

Will try it this weekend to get them out properly. (Wish me luck)

Got some MAT BLACK paint for the tank, fuel rail, wheels, swing arm and so on. YEAHHHH

Pictures of all will follow soon.

Cheers, Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 19, 2016, 04:16:38 AM
Hi Guys,

Regarding the battery, I found this one on the internet and i'm curious if some has some expirience with it. I used the search button but nothing came up on ultrabatt.

http://www.ultrabatt.com/batteries

They are powerfull and tiny, great to fit betweet the frame under the seat :)
What is the minimum power the K75 needs to start up, I found: 12 VOLT, 30 AH ?

Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: TrueAce on August 19, 2016, 08:38:00 AM
Interesting video, Laitch. My Russian is rusty, but I did hear repeated exhortations to " Bang the shit outta that MF!". Looked like typical day at the Ural plant, or a red neck shade tree garage, but what exactly were they doing, extracting engine teeth?
Title: Re: K75S caferacer project - Hedgehog
Post by: Laitch on August 19, 2016, 09:32:26 AM
Interesting video, Laitch. My Russian is rusty, but I did hear repeated exhortations to " Bang the shit outta that MF!".
:giggles
Did you see the one with the guy using the backhoe to pull the injector? That's the solution for loners.

Anyway, here's a useful tool—a variation of which should be available for small blocks. Vladimir Lenin's great-grandson narrates.
https://www.youtube.com/watch?v=gOrNZd99bOE#t=22
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 19, 2016, 09:54:34 AM
Anyway, here's a useful tool—a variation of which should be available for small blocks. Vladimir Lenin's great-grandson narrates.


I will try to use some tools that we have at home, I think I will get them out properly.

Send some picture of the result.

Anyways, regarding the injector/fuel. My rail is made from steel and not alloy as most of rails I see up here on the forum. I'm sanding the paint of to repaint it also.

Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: billday on August 19, 2016, 10:16:52 AM
I will try to use some tools that we have at home, I think I will get them out properly.

Send some picture of the result.

Anyways, regarding the injector/fuel. My rail is made from steel and not alloy as most of rails I see up here on the forum. I'm sanding the paint of to repaint it also.

Cheers,
Nick

Yeah, well, I was wondering: why did you pull off your fuel rail like that, anyway? Now I understand.

Normally, people pull the injectors as part of refurbishing the whole intake and fuel delivery system. If you do it right your bike will be good for another 20 years. There are threads and how-tos in this very forum.

Since you're pulling this bike to pieces anyway, why not take some time to understand how it works and what its maintenance needs are?
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 19, 2016, 10:35:05 AM
Since you're pulling this bike to pieces anyway, why not take some time to understand how it works and what its maintenance needs are?

Bill, Ill be learning on the way. I understand how the engine works. But I learned better safe then sorry. So why not search/ask the forum instead of inventing the wheel again :)

I'm not taking the engine appart, it runs good. As you can read back in the posts I was planning to put 3 separate K&N filters on the throttle body and wasn't aware of the Bosch fuel injection system. Also during this reading i took of the rail.

The front fork, tank, seat, battery, taillaight and so will be done by me. The engine I will leave alone for now.

Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: Revrdmark on August 19, 2016, 10:58:51 AM
Nick, I saw on another forum that the BMW automotive injectors fit the bricks. They have 4 nozzles instead of the old stock one nozzle. According to the guy that did it it improved performance. Since you will have them out you might look into it ??? I'll see if I can find a link.  Not sure if there would be any ramifications to it though. Bikes put out a hella lot of power just before they blow up! Lol

I may try it eventually but I'm usually a "if it's not broke don't fix it" kinda guy


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Title: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 20, 2016, 09:13:42 PM
And we got some parts :) pictures are made on the table after unpacking.


(http://uploads.tapatalk-cdn.com/20160821/f0af5c6d2946b62a1635a8a49a0e986d.jpg)(http://uploads.tapatalk-cdn.com/20160821/57a78ba4c1a45d2f499d2766880b5e17.jpg)

Here are the strap-ons mounted on the fork. (The tank is only mounted to adjust the strap-ons)
(http://uploads.tapatalk-cdn.com/20160822/8f65123fc2af904daabb39c306776793.jpg)

Also i'v sand blasted the fork upper plate. I will leave it for now but maybe I will paint it also black together with the tank.
(http://uploads.tapatalk-cdn.com/20160822/c36530fe040d44b7388e6daf7f39d504.jpg)

Cheers,
Nick


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Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 25, 2016, 08:46:09 AM
Hi guys,

Last couple of days i'v been busy on mounting the clip ons, new grips and so on.
Tomorrow will the paint arrive and I can start painting the tank and fuel rail next week.

Further on i'm attending to buy a aftermarket speedometer with control lights. i'v seen one on Cafe4Racer.eu and it looks like a mix of Acewell and KOSO (probably also Taiwanees design)
The price is good €60,- a piece, also saw some video's online of people using it on their bikes. Link: http://cafe4racer.eu/en/instruments-speedometers/96-motorcycle-dual-odometer-speedometer-gauge-led.html (http://cafe4racer.eu/en/instruments-speedometers/96-motorcycle-dual-odometer-speedometer-gauge-led.html)

Now i'm a bit worried about the wirering. I'm buying the Maru Labs 2.0 box to use the OEM connectors of the BMW K75.
I compared all the options of the box/bmw towards the diagram of the Speedometer, but just want to be sure all will fit propperly.

So by any change someone with more knowledge or already wired an aftermarket speedometer can check if all will fit.

Below the diagram of the Speedo and attached the diagram of the BOX:

4.Diagram  :
A .Purple black - RPM   
B.Black-Live from key inition
C. Light blue- right side signal 
D :dark blue-- high light
E white yellow - neutral
F orange-- left side signal
G Brown - running light
H Red- direct from battery
I  Black  white -- speed
J   Purple ---  conenct the sensor directly
K  light green-- gear 1
L light green brown -- Gear 2 
M  light green green --  3
N  light green yellow - 4
O  light green black -- 5
P  light green blue -- 6
Q  green black -- grounding 
R  Green black -- Grounding 
S  blue white -- fuel  level 


Thanks already !

Updates with pictures next week :) :) :)
Title: Re: K75S caferacer project - Hedgehog
Post by: rbm on August 25, 2016, 11:49:31 AM
I've tested this gauge with my TGPI card and it works well.  It should also work with the Brotbox.

Based on the pinout table you provided, this would be the pin mapping table for the Brotbox:

A -> No Brotbox mapping.
B -> Live from key ignition
C -> 1-9
D -> 2-10
E -> 1-8
F -> 1-11
G -> 2-1
H -> 1-1
I -> 2-11
J -> ???? I have no idea.
K -> 1-3
L -> 1-4
M -> 1-5
N -> 1-6
O -> 1-7
P -> No Brotbox mapping.
Q -> 1-12
R -> Connect to bike ground
S -> No Brotbox mapping.

I've attached a translated version of the Brotbox manual and a picture of the pinout for that gauge to this email.

Pin A is the RPM signal but unfortunately the Brotbox does not bring this pin out to the connector.  You will have to either tap the signal on the Black/Blue wire or run another wire to the pin and wrap the other end 6 times around the #1 spark plug wire coming off the coil.  Either method will provide a usable RPM signal.

As for the fuel gauge (your Pin S - gas), you can feed the fuel sender output to this pin so long as you modify the sender according to my instructions on K100-forum (http://www.k100-forum.com/t9265-messing-with-the-in-tank-fuel-sender).
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 25, 2016, 12:00:06 PM
Well thats fast and great !

Thank you so mutch, got all parts in order now and need to await the supply.

Again thanks RBM !

Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 31, 2016, 01:08:02 AM
Hi guys !

So after a week Iv done a lot on the bike :)

Painted the tank
Painted the fuel rail
Replaced the cooling water revervoir and relocated it.

At this moment i'm awaiting the supply of the exhaust and head light to finisch the front of the bike.

I recently reveived the rear loop so in a couple of week I will start cutting of the rear and weld the loop on. Later on more about this.

Se below the pictures of all:
(http://uploads.tapatalk-cdn.com/20160831/bd12c8fa265211ba945b877712b874b3.jpg)(http://uploads.tapatalk-cdn.com/20160831/6d8e2b8727327d6c519e219e528e4985.jpg)(http://uploads.tapatalk-cdn.com/20160831/8db91b938b36934ed6a2953e691e7661.jpg)(http://uploads.tapatalk-cdn.com/20160831/50248365b4e762095cfa7efecd71a088.jpg)(http://uploads.tapatalk-cdn.com/20160831/b33b8c727c262f4bb9187f0f28f4d7a4.jpg)(http://uploads.tapatalk-cdn.com/20160831/4e1ffdc9dc36d0d0e008c58062d6e37d.jpg)(http://uploads.tapatalk-cdn.com/20160831/9be82a80299152821a31e2e1616f084f.jpg)(http://uploads.tapatalk-cdn.com/20160831/5e0b033c83f91894cf5fcc6fd1bf93b1.jpg)

The relocating and replacement of the reservoir: (I have to finish the mount and oil can I used)
(http://uploads.tapatalk-cdn.com/20160831/132e41cbb6f6127b2a275167df662125.jpg)(http://uploads.tapatalk-cdn.com/20160831/132f2e6b607cd965a6ee55ff36c9a6d5.jpg)(http://uploads.tapatalk-cdn.com/20160831/e66fc3e76a3500962a9f37f99a56d9fe.jpg)

And the bike is now waiting for it's parts like:
(http://uploads.tapatalk-cdn.com/20160831/799bbeddca54912bde819421ddce56bf.jpg)(http://uploads.tapatalk-cdn.com/20160831/f0c583cd3b3105b643485176797d8e28.jpg)


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Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 31, 2016, 07:19:18 AM
Yeah the exhaust arrived and as I expected and read on the internet. The exhaust muffler is filled with crappy wool.

I bought good quality wool together with the muffler and installed it today. Also got a db killer but not sure if I need that.

The sound will be tested this weekend when the fuel rail and tank are mounted back.

Below pictures of the muffler:
(http://uploads.tapatalk-cdn.com/20160831/5fdc289244db0a16cca904a20e98508f.jpg)(http://uploads.tapatalk-cdn.com/20160831/7d148746d077a9136fbda2a680aacebc.jpg)(http://uploads.tapatalk-cdn.com/20160831/f9d281b198596892a8abd823b0ae0557.jpg)


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Title: Re: K75S caferacer project - Hedgehog
Post by: TrueAce on August 31, 2016, 09:59:27 AM
Good work, good pictures, that's a clever catch can, too bad that snorkel blocks the view.
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on September 02, 2016, 04:26:31 PM
Hi guys !

A update regarding the fresh painted tank, fuel rail + new injector o-rings and also I started to work on the seat and bike rear.

I placed the tank back and WOW what a face. The bike gained in my eyes. The look is fantastic. At this moment I made a braket out  of a steel plate to use the old speedo. I ordered the BEP but it takes up to 6 weeks production :(

(http://uploads.tapatalk-cdn.com/20160902/c1791506cf2a5a30e42a9c6da2dec1e8.jpg)(http://uploads.tapatalk-cdn.com/20160902/4b94896f3fd1cae80911f6e162e4fd47.jpg)(http://uploads.tapatalk-cdn.com/20160902/a995d85790c80837cae3e33ec2dc54ef.jpg)

Here the progress pictures of the rear cut of and welding a small angle up in the rear round loop. Besides that I started making the double seat.
(http://uploads.tapatalk-cdn.com/20160902/d1bdfe637d8c9c4958a7ff325578a656.jpg)(http://uploads.tapatalk-cdn.com/20160902/f321aa4faffc8ef7db360db1572bf1c4.jpg)(http://uploads.tapatalk-cdn.com/20160902/50fb0348a64e17ec912745eeda09246d.jpg)(http://uploads.tapatalk-cdn.com/20160902/48d735252a5e86a719016c77f63b14c3.jpg)(http://uploads.tapatalk-cdn.com/20160902/f882a9006ccb7fd5f934adbfa9cdecc1.jpg)(http://uploads.tapatalk-cdn.com/20160902/7c36ca58ab4069b542af1088db441c0e.jpg)(http://uploads.tapatalk-cdn.com/20160902/493d6612abaf4c783cc6093711bb48fe.jpg)

Cheers
Nick


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Title: Re: K75S caferacer project - Hedgehog
Post by: Markus77 on September 05, 2016, 08:37:27 AM
Great progress - looks like it's really starting to come together!
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on September 23, 2016, 03:06:50 AM
Hi guys,

Been quite busy with work and also the bike for the last weeks.

Here a new update on the bike with pictures.

What is done:
-Coolant reservoir sealed, put in place and tested. (Still working on a propper mount)

- subframe welded tot the frame

-lowered the front fork 40mm

-mounted the headlight, direction light. All tested en worked :)

-ordered a Koso multi-speedo (awaiting the BEP 3.0 to arrive)

More will folow after this weekend.


(http://uploads.tapatalk-cdn.com/20160923/f9357ac6d6ebedf8371e98f52738270f.jpg)(http://uploads.tapatalk-cdn.com/20160923/de7668ef8e231f0e0190775096ba6952.jpg)(http://uploads.tapatalk-cdn.com/20160923/d8f873ce2b4c097c743d89bc0aa0ca41.jpg)(http://uploads.tapatalk-cdn.com/20160923/848dbaed2e03ed7b4aef8966f05ca563.jpg)(http://uploads.tapatalk-cdn.com/20160923/208f5ada843d06c0455ea69ec6dbbe14.jpg)


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Title: Re: K75S caferacer project - Hedgehog
Post by: duckytran on September 23, 2016, 08:58:10 AM
Nice work! Are you going for an all black murdered out finish? Just curious, but is that the location where you'll mount the coolant reservoir?
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on September 23, 2016, 09:05:45 AM
Nice work! Are you going for an all black murdered out finish? Just curious, but is that the location where you'll mount the coolant reservoir?

Hi Ducky,

No the frame will be gray, tank and front fender black, seat and grips brown.

Some parts such as the foot pegs, fork clamping plates i'm not sure about yet.

Yes that is where I mount the reservoir, this i order to keep the whole sight trough the A frame as clean as possible.

Cheers,
Nick


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Title: Re: K75S caferacer project - Hedgehog
Post by: duckytran on September 23, 2016, 09:42:19 AM
Hi Ducky,

No the frame will be gray, tank and front fender black, seat and grips brown.

Some parts such as the foot pegs, fork clamping plates i'm not sure about yet.

Yes that is where I mount the reservoir, this i order to keep the whole sight trough the A frame as clean as possible.

Cheers,
Nick


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Nick,
I was able to use Rizoma "Pro" Tapered Racing footpeg and their universal adapter on my K75. It will fit on the stock footpeg plate with a little sanding down of the adapter piece. The Rizoma Touring peg will also work if you want something a little bigger.
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on September 28, 2016, 07:40:31 AM
Hi guys !

And we are again a bit further.
Welded some mounts for the seat on the frame, made a license plate holder next to the rear spring.

Started working on the seat and foam for the seat to make it all in shape.

Regarding the rear brake light and indicator lights, can any one advise if there is a wire scheme ?

There are a lot of wires attached to the original plug and the last thing I want is to mess up with the wires :)

(http://uploads.tapatalk-cdn.com/20160928/9704c19d562afa3d931010ceffd7cfa2.jpg)(http://uploads.tapatalk-cdn.com/20160928/389ce67ecbb4453caf478dcb31f7e618.jpg)(http://uploads.tapatalk-cdn.com/20160928/f5d29ef49398afa5fc6e1799bc522ff2.jpg)


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Title: Re: K75S caferacer project - Hedgehog
Post by: rbm on September 28, 2016, 01:15:56 PM
There are only 5 connections to sort out.  The wiring scheme is:
1. Blue/Black = rear right turn signal
2. Grey/Yellow = rear brake light
3. Brown = Ground
4. Grey/Black = rear running light
5. Blue/Red = rear left turn signal

Since each wire is dedicated to its purpose, wiring any aftermarket tail assembly should be straight-forward.  Remember to follow all the precautions for LEDs, well documented on this forum.
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on October 06, 2016, 04:08:30 AM
Hi Guys !

I'm working on the KOSO speedo with the BEP 3.0 to keep the wirering Original and because it is very helpfull.
The KOSO comes with a magnetic speed pickup to mount on the front wheel.

Any one some pictures to mount it propperly ?

Thanks a lot

Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: duckytran on October 06, 2016, 08:55:22 AM
Hi Guys !

I'm working on the KOSO speedo with the BEP 3.0 to keep the wirering Original and because it is very helpfull.
The KOSO comes with a magnetic speed pickup to mount on the front wheel.

Any one some pictures to mount it propperly ?

Thanks a lot

Cheers,
Nick

Nick,

Here's where I mounted my Acewell speed sensor and magnet.
Title: K75S caferacer project - Hedgehog
Post by: Revrdmark on October 06, 2016, 09:12:23 PM
Hi Guys !

I'm working on the KOSO speedo with the BEP 3.0 to keep the wirering Original and because it is very helpfull.
The KOSO comes with a magnetic speed pickup to mount on the front wheel.

Any one some pictures to mount it propperly ?

Thanks a lot

Cheers,
Nick

I made a little bracket out of scrap metal and mounted it on front forks. The Acewell sender is a little different it reads from two spots that are perpendicular to the magnets I think the Kosovo reads from the end, so you point the barrel at the magnet rather than parallel to the wheel like the Acewell. Anyway here's how I set mine up.

(http://i37.photobucket.com/albums/e66/RevrdMark/1987%20BMW%20K100%20Build/3B1900D2-63DB-41E7-9DEF-C4943EA6A928_zpsoqiengxm.jpg)


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Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on October 07, 2016, 03:03:25 PM
Ah great guys thanks !

I just have to make something that will hold the bracket that came with the speedo. I tried to manage it with only the supplied bracket.

Update on all will follow soonest.

Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: racket on October 07, 2016, 04:02:49 PM
Any plans to remove the airbox and mass airflow sensor?
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on October 19, 2016, 01:54:17 PM
Any plans to remove the airbox and mass airflow sensor?

Hi Racket sorry for my late reply.

I'm quite busy with the bike actually, first of all i'm riding it at them moment. There are major traffic jams each morning during the fact that a bridge is closed for trucks. There a some cracks found :(

This weekend I will go to Millerkustomupholsty for my seat design, leather color, stitching and so on.

At this moment i'm riding with strap-ons, however this is not very comfy at all so i'm attending to buy a super bike handlebar and mount this up-side-down on the existing handlebar holders. Still thinking of it.

Regarding the air box and flow sensor. I'm working on a solution to get rid of them and use a custom made air box (I will use a stainless steel tube) and create a mount to attach a K&N filter directly on to it. (a few people done this before) Will send some picture when I have it all cleared up. If u like it then I can help you make one yourself.

This winter the complete bike we be teard down and repaint all parts.
I'm going for a grey frame, black on black on black rims, tank, fork.
Brown seat and grips.

I made a small mount for the KOSO speedo i'm using and now I'm awaiting the BEP 3.0 to make it work  :riding:
Picture will follow.

Also I have a huge question on the footpegs. Does any one has some advise which rear sets to order or anything els.
I saw a few on a china webshop but not sure if they will fit. I'm willing to make a plate my own and add steps and brake/gear peg to it but I don't know where to start and get all together.

Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog
Post by: duckytran on October 19, 2016, 01:59:57 PM
Nick,

BSK Speedworks out of the UK has a rear set specific for K-Bikes.

http://www.bskspeedworks.co.uk/k-rearsets.html

Pricey, but no mounting plates needed.

Duc
Title: K75S caferacer project - Hedgehog - * UPDATE *
Post by: NickHeijman on January 09, 2017, 09:39:50 AM

Hi guys,


I'v been out for a short because had a full agenda at work and private.
Looking back on all your response and the information gained in the time.


What happend in the last weeks?!:

Bike teardown
Cutting the frame and making the frame straght
Painting the engine
Painting the rims
Painting all the "small" parts
Painting the tank
The seat is finished by Miller Custom Upholstry from (NL)
Getting a new batt from MOTOBATT
Speedo received the KOSO DB03 + extended all wires to arrange it to the BEP
BEP 3.0 received to make the speedo work propperly
New rear spring is ordered and will arrive soon

Now i'm finishing up the frame and get it painted.

I'm make a custom airbox to fit the flow meter and ofcourse end up with a nice K&N air filter  :riding:


Any questions are most welcome !

Attached the pictures:


Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on February 01, 2017, 03:31:24 AM
And it's assembly time !

(https://uploads.tapatalk-cdn.com/20170201/03d10b21976f2a7e3832517a5fef6613.jpg)(https://uploads.tapatalk-cdn.com/20170201/8b30e11bffb52e8dd77aca1abcd19593.jpg)(https://uploads.tapatalk-cdn.com/20170201/d2d8b4323409dd27d558f75b9637ef23.jpg)(https://uploads.tapatalk-cdn.com/20170201/0ac9f8e16583f2f990d1f3eac322c092.jpg)(https://uploads.tapatalk-cdn.com/20170201/e3116119c49a661cab536e161efbdad7.jpg)(https://uploads.tapatalk-cdn.com/20170201/e3a20db249623375f5d2f26f8e0911de.jpg)


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Title: Re: K75S caferacer project - Hedgehog
Post by: Markus77 on February 01, 2017, 06:29:17 AM
Looks great so far! Cant' wait to see it completed - awesome ohlins as well:)
Title: Re: K75S caferacer project - Hedgehog
Post by: Boxermann on February 01, 2017, 07:54:20 AM
+1 on Markus77.  :2thumbup:
Title: Re: K75S caferacer project - Hedgehog
Post by: duckytran on September 14, 2017, 03:01:17 PM
Any update Nick?
Title: Re: K75S caferacer project - Hedgehog
Post by: Wilky on September 14, 2017, 03:45:36 PM
 [ Invalid Attachment ]

Nice work. What's the large crank out of in the background?
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on September 15, 2017, 04:47:14 AM
Hi guys,

Yeah there has been some changes during the months.
First I had a problem with the rearshock, now I have the YSS shock.

Then I had a leaking oil/waterpump now fixed.

In the meantime BEP 3.0 installed with the koso speedo, got the RPM working but the speed not yet. So have to dig into that again.

Made a airhousing to place an K&N airfilter :)
Ps: making some extra to sell :yes

But then, my crazy mind decided to cut the frame again and make it a single seat instead of 2 person seat.

The crankshaft is from an SWD F240 engine (we deal/supply new and reconditioned Wartsila and SWD spare parts)

See below update pictures:
Title: Re: K75S caferacer project - Hedgehog
Post by: duckytran on September 15, 2017, 08:51:38 AM
Nick,


Can you provide more details on this? Did you have to remove the stock airbox entirely? I've seen this done many times on the K100, but not on the K75.


Made a airhousing to place an K&N airfilter :)[/size]Ps: making some extra to sell
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on September 15, 2017, 09:00:34 AM
I'm making them, you can buy one.
Send me a PM ill give you some pictures and details.

Cheers
Title: Re: K75S caferacer project - Hedgehog
Post by: Christopherguzzi on September 15, 2017, 11:15:46 AM
It's fun to see your project progress as you take apart your bike and put it back together, transforming it into your vision in the process.  Having done just a little bit of work on my bike to make it roadworthy, I can appreciate all the effort, and expense, you have put into this project. 
 :2thumbup:
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 20, 2018, 10:43:15 AM
Hi all,

This quick reply window tells me that there is no post done for at least 180 day.
Again a lot has changed to make this project a real custom project.

The complete frame is chopped, the rearshock is now horizontal and the full subframe/tail has been modified.

The DGR is comming up 30th of September and I’m keen te get the bike 90% done by then.
Except for the new painting job which will be done by a painter.

Hope to get some more pictures online this sunday.

Cheers
Nick

!!!! Chopped frame !!!!


Title: Re: K75S caferacer project - Hedgehog
Post by: Roland on August 20, 2018, 03:52:19 PM
This is a slippery slope. I speak from experience. I too chopped my frame again and kept going and at every point i thought maybe I should do more so I did and I ended up with something with no finished project in sight kinda. Bike is looking good so far though.
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 20, 2018, 04:07:53 PM
Hi Roland,

I’m already working on the rear shock and it works now.
Below is a short picture of it. Any tips or recommendations are welcome. Can still adjust all :)

Cheers
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 20, 2018, 04:41:23 PM
greetings...

im gonna call this the ronaldjeremyhyatt project...

j o

Whahahahaha ! I ain't got a hairy back bmp
Furthermore since I don't have a hairy back, I assume you think the bike is porn :)

Cheers
Title: Re: K75S caferacer project - Hedgehog
Post by: Roland on August 20, 2018, 05:40:55 PM
I have a question. How did you weld stuff to the final drive? its cast so I assume the weld was very dirty, if not I would like to know what it was like? was it an easy weld and does it hold up to the stresses of the suspension? thanks. Make sure to really adjust the dampening on the shock. You can put a shock that kinda works and it will be fine but if you wanna go fast I would take the shock to a guy who knows what they are doing(unless that is you) and revalve it to go with the now progressive shock movement due to the nature of rockers. thanks for the pick. it looks real good.
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 21, 2018, 04:57:01 PM
No No welding to the cardan or any engine parts.
Made a bracket that can be mounted and bolted on the rear stud on the cardan (original shock mounting point) and the 2 upper bolts of the cardan on the swingarm. On the frame I welded a nice "cage" of thick metal plates which holds the upper part of the shock in place with a M12 bolt trough the needle bearing on the shock eye.

Hope this is sufficient :)
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 21, 2018, 05:01:27 PM
Thursday I wil get the frame back from the welder, then its cleaning time. Make all edges of the frame smooth and also the weldings. Guess I can manage to get the frame also painted. Ill drop some picture once I have them.

To day the rubber manchet of the clutch system ripped apart and all the oil is now on the floor hahaha.
Ordered a new manchet, so there is more work to do then I could image. I'm also waiting the fork seals to start rebuilding the forks and paint them also. I have 5 weeks left to finish the bike (not the tank painting, this will be done later) because I'm joining the DGR again.

Hope I will catch some eyes, because its the same bike, different looks hihi

Cheers
Title: Re: K75S caferacer project - Hedgehog
Post by: Eccl.12vs13 on August 22, 2018, 12:20:40 PM

* e3116119c49a661cab536e161efbdad7.jpg (72.09 kB . 768x576 - viewed 1140 times)


Are you planning on using the Ohlins shock? If not are you willing to part with it?

Thanks,
R.V.
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 22, 2018, 01:03:35 PM
greetings...

canadicans are not reliable...

j o

?
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 23, 2018, 03:34:52 PM
Got the frame back from the welder, smoothen the weldings and sandbladted the rear part of the frame.
Saturday will be painting day for the frame, engine, custom airhousing, seat, rims and fork.

Any updates on small adjustments such as removing the relay box, relocate the relays etc will come later on.

Picture of the frame.

Cheers,
Title: Re: K75S caferacer project - Hedgehog
Post by: johnny on August 24, 2018, 12:09:24 PM
greetings...

needs a right side kick stand...

j o
Title: Re: K75S caferacer project - Hedgehog
Post by: Roland on August 24, 2018, 12:48:14 PM
the kick stand o n these bikes is reversible just need a stopper made so it does not hit the oil sump and you with have to remove the centerstand
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 27, 2018, 08:37:29 AM
The centerstand is already gone.
Will check this week if I will swap it to the other side.

Thanks for the suggestion  :clap:
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on August 31, 2018, 08:18:46 AM
Hi All,

Here is an update on the bike.
- Frame painted (again hahaha)
- Engine painted
- Cable harnas made ready
- Frame mounted on the engine, cardan and driveshaft checked and re-lubed.
- Gearbox and engine oil flushed and renewed.
- Wheels mounted
- Rear shock mounted
- Made a tray under the tank to fit all the relays in. (picture will follow)


Cheers,
Nick
Title: Re: K75S caferacer project - Hedgehog - * UPDATE *
Post by: Skunky on August 31, 2018, 05:53:13 PM
Hi,

I don't pretend to be a structural engineer. But that seems a long way without cross frame support. Considering the original frame was hooped with two other welded cross members under the seat. Could be a bit twisty on the bends. Especially with the rear suspension on one side of the frame.

 [ Invalid Attachment ]
Title: Re: K75S caferacer project - Hedgehog - * UPDATE *
Post by: NickHeijman on August 31, 2018, 06:11:44 PM
Hi,

I don't pretend to be a structural engineer. But that seems a long way without cross frame support. Considering the original frame was hooped with two other welded cross members under the seat. Could be a bit twisty on the bends. Especially with the rear suspension on one side of the frame.


* IMG_7285.JPG (146.67 kB . 640x480 - viewed 1007 times)

Have you seen the new design of the bike?
Title: Re: K75S caferacer project - Hedgehog - * UPDATE *
Post by: Skunky on August 31, 2018, 11:38:59 PM
Have you seen the new design of the bike?

YES!
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on September 09, 2018, 06:23:31 AM
Getting closer to the DGR and nearly finished the bike.

Got the harnass in place and still need to rewire the batt since the new location request longer cables.
Made the mounts on the rearframe for the seat and also started the leather for the seat.

All fluids are refreshed, relays are in a box under the tank, airflowsensor relocated and the exhaust is done.
First kick and run was a huge succes. Just one click, no choke and running as a BMM K !!!

Complete rear is finished now, rear sets work, rearbrake, seat mounting, licenceplate location and rear/brakelight.

Front is nearly done, headlight is in place, fork rebuild and now awaiting the new brakelines to arrive and being installed.

Took some pictures during the process, see below the result.
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on September 12, 2018, 05:25:59 AM
Only a few things left to do.
Licenceplate light
Seat
Install the batt

Ready for DGR 2018
Title: Re: K75S caferacer project - Hedgehog
Post by: billday on September 12, 2018, 08:52:45 AM
Huge change on the steering geometry up front . . . looks a little scary . . .
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on September 12, 2018, 09:38:01 AM
I droped the fronkt for 5cms, another build from close to me did the same.
Drove the bike and the handling was still very nice, the corners are a bit wider now, still a nice handling and control on the bike.

If afterwards the handling isnt so nice, just lift the front up and where good to go.
Title: Re: K75S caferacer project - Hedgehog
Post by: johnny on August 04, 2019, 01:23:17 PM
greetings...

this page of this thread has an attachment error... its f-ing up things when visitors are hitting it...

its gotta go...

butts lotts of info on this page... dont wanna whack the thread... so gonna whack attachments...

more on this later...

j o

Cafe Racer Bible (http://www.motobrick.com/index.php/topic,12437.0.html)
Title: Re: K75S caferacer project - Hedgehog
Post by: NickHeijman on October 23, 2019, 12:43:00 PM
Bike is finished in the meantime and will update this post soonest with all i've done.

Title: Re: K75S caferacer project - Hedgehog [Finished]
Post by: Skunky on October 29, 2019, 12:39:30 AM
Looks great. Not sure about the three cup holders I think your drinks will spill on a left hander. Like the suspension set up though. How does it handle.
Title: Re: K75S caferacer project - Hedgehog [Finished]
Post by: Zfoster8 on November 07, 2019, 07:34:48 PM
Gorgeous cafe.

I just picked up an '87 K75s for dirt cheap and I have been toying with the idea of hacking it since it hasn't cost me much so far. This is an awesome example.
Title: Re: K75S caferacer project - Hedgehog [Finished]
Post by: billday on November 07, 2019, 08:54:01 PM
Looks great. Not sure about the three cup holders I think your drinks will spill on a left hander. Like the suspension set up though. How does it handle.

Thought those were ashtrays.
Title: Re: K75S caferacer project - Hedgehog [Finished]
Post by: The Mighty Gryphon on November 07, 2019, 10:02:38 PM
Thought those were ashtrays.

I think they're cupholders. 

They're not in a really convenient place, though, and at that angle the coffee will probably spill out, especially on left turns.   On the other hand, they are a brilliant use of the heat coming off the engine to keep the rider's coffee piping hot during long rides.  By having three, at least one can hold a muffin to go with the coffee.  The third could make a baked potato for a dumpster side lunch.

I have to give kudos to the builder for finding such a creative way to replace at least some of the lost storage.