Author Topic: K75S caferacer project - Hedgehog  (Read 28452 times)

Offline TrueAce

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Re: K75S caferacer project - Hedgehog
« Reply #50 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?
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  • '85 K100GS, '85 K100RSSC,', '94 K1100RS,'10 S1000rr,'14 Ural Sidecar, '15 R Nine T

Offline Laitch

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Re: K75S caferacer project - Hedgehog
« Reply #51 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.
  • Along the Ridley in Vermont.
  • 1995 K75T 68,000 miles
I wept because I had no radials until I met a man who had no splines.
http://www.motobrick.com/index.php/topic,296.msg53303.html#msg53303

Offline NickHeijman

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Re: K75S caferacer project - Hedgehog
« Reply #52 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
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  • BMW K75S

Offline billday

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Re: K75S caferacer project - Hedgehog
« Reply #53 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?
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Offline NickHeijman

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Re: K75S caferacer project - Hedgehog
« Reply #54 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
  • Breda
  • BMW K75S

Offline Revrdmark

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Re: K75S caferacer project - Hedgehog
« Reply #55 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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Offline NickHeijman

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K75S caferacer project - Hedgehog
« Reply #56 on: August 20, 2016, 09:13:42 PM »
And we got some parts :) pictures are made on the table after unpacking.




Here are the strap-ons mounted on the fork. (The tank is only mounted to adjust the strap-ons)


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.


Cheers,
Nick


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Offline NickHeijman

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Re: K75S caferacer project - Hedgehog
« Reply #57 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

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 :) :) :)
  • Breda
  • BMW K75S

Offline rbm

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Re: K75S caferacer project - Hedgehog
« Reply #58 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.
  • Regards, Robert
Toronto, Ontario

1987 K75 - Build Blog @http://k75retro.blogspot.ca/

Offline NickHeijman

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Re: K75S caferacer project - Hedgehog
« Reply #59 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
  • Breda
  • BMW K75S

Offline NickHeijman

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Re: K75S caferacer project - Hedgehog
« Reply #60 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:


The relocating and replacement of the reservoir: (I have to finish the mount and oil can I used)


And the bike is now waiting for it's parts like:



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Offline NickHeijman

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Re: K75S caferacer project - Hedgehog
« Reply #61 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:



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Offline TrueAce

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Re: K75S caferacer project - Hedgehog
« Reply #62 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.
  • Florida
  • '85 K100GS, '85 K100RSSC,', '94 K1100RS,'10 S1000rr,'14 Ural Sidecar, '15 R Nine T

Offline NickHeijman

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Re: K75S caferacer project - Hedgehog
« Reply #63 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 :(



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.


Cheers
Nick


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Offline Markus77

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Re: K75S caferacer project - Hedgehog
« Reply #64 on: September 05, 2016, 08:37:27 AM »
Great progress - looks like it's really starting to come together!
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Offline NickHeijman

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Re: K75S caferacer project - Hedgehog
« Reply #65 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.





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Offline duckytran

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Re: K75S caferacer project - Hedgehog
« Reply #66 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?
  • Austin, Texas
  • 1993 K75, 1981 R65

Offline NickHeijman

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Re: K75S caferacer project - Hedgehog
« Reply #67 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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Offline duckytran

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Re: K75S caferacer project - Hedgehog
« Reply #68 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.
  • Austin, Texas
  • 1993 K75, 1981 R65

Offline NickHeijman

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Re: K75S caferacer project - Hedgehog
« Reply #69 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 :)




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  • Breda
  • BMW K75S

Offline rbm

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Re: K75S caferacer project - Hedgehog
« Reply #70 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.
  • Regards, Robert
Toronto, Ontario

1987 K75 - Build Blog @http://k75retro.blogspot.ca/

Offline NickHeijman

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Re: K75S caferacer project - Hedgehog
« Reply #71 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
  • Breda
  • BMW K75S

Offline duckytran

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Re: K75S caferacer project - Hedgehog
« Reply #72 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.
  • Austin, Texas
  • 1993 K75, 1981 R65

Offline Revrdmark

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K75S caferacer project - Hedgehog
« Reply #73 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.




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Offline NickHeijman

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Re: K75S caferacer project - Hedgehog
« Reply #74 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
  • Breda
  • BMW K75S

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