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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => Project Custom Motobricks => Topic started by: 850Commando on April 16, 2017, 09:06:26 AM

Title: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on April 16, 2017, 09:06:26 AM
Hi All - Massively inspired by the stuff on this site (in particular builds by beachcomber and jc55) so decided to try to make my own K75 Special, So far just acquired a 1993 K75RT - Due to limited time and no easy access to workshop I'm gonna try to achieve maximum effect with minimum engineering input (cos most of you guys seem to have engineering skills and know-how I can only dream of). Any advice or comments will be gratefully received.
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: Elipten on April 16, 2017, 10:11:37 AM
Yep sell me that faring if not damaged


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Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on April 16, 2017, 01:09:49 PM
Hi Elipten - I won't be needing the faring but you're a long way away and its a bulky item
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: Glacial on April 16, 2017, 03:05:35 PM
I'm only the length of the M11 from you so I could get interested in buying things you take off your bike. Let me know as you progress.
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on April 16, 2017, 06:38:30 PM
Will do Glacial..
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: jc55 on April 17, 2017, 08:22:21 PM
I'll be tagging along.
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on April 18, 2017, 05:49:14 PM
hey thanks JC
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on April 22, 2017, 06:58:23 PM
Starting with the front the clocks are a problem.. Just too big..  I've googled a ton of photos of K75/100 cafe racer specials but nearly none use the original clock pod.. Trouble is, from reading I'm forming the view that changing the clocks and maintaining most of the functionality will probably take pore work and time than the whole rest of the build.. so I've been looking for ways to work the original clocks into the design..  I found this bike:


http://www.motorcyclespecs.co.za/model/Custom%20Bikes/BMW%20K75%20S%20Cafe%20Racer%20by%20Hammer%20Kraftrad.htm


The Monza fairing allows the clocks to be concealed.. I figure it may be possible to mount them on the spider that suppports the headlamp so they dont move with the forks.


So I;ve got a sharp 'monza' style fairing designed for a R series BMW from 'flatracer' in London which I think will fit with a bit of tweeking - Thi sis one of their pics of said fairing on a boxer:

Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on April 22, 2017, 07:22:59 PM
Also got some cool - semi raised 'strap-ons' from Flatracer:
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on April 22, 2017, 07:34:46 PM
.. I mean 'strap-ons'  :) (is there any way to go back and edit a post to correct typos? )
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: Filmcamera on April 22, 2017, 07:45:09 PM
Strap ons?? Really - freudian much?!  :hehehe


Yes there is a way to edit posts but only later when you are a more experienced motobricker...

Though rumour has it that Johnny has the power to bequeath all sorts of honours on those he deems worthy

Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: Laitch on April 22, 2017, 08:18:13 PM
(is there any way to go back and edit a post to correct typos? )
That isn't a typographical error; it's a libidinal disclosure. :giggles
I think this new name for these parts is trending and you're among its vanguard, Commando. The following reference though has just the right touch of S&M; it would be hard to beat that one—if you'll pardon the expression.

I found both parts at DCC and ordered the 41mm strap-ons.  In order for the strap-ons to fit, I ended up using a little brute force and a pair of pliers to widen up the openings.   
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: Martin on April 22, 2017, 10:37:36 PM
Very interesting.  :popcorm
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: jc55 on April 23, 2017, 08:31:46 AM
I'm loving this build already. Race fairings with the original gauges are gonna rock!


I didn't cut the front ears off of my tank because my front fairing mounting points use those. I'd suggest keeping that option open.
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on April 23, 2017, 09:23:20 AM
Hi JC55 - yes, I'm leaving the tank lugs to give a second point of fixing for the fairing lower 'wings'..  LED headlamp arrived yesterday -
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on April 23, 2017, 09:26:49 AM
...I've just got to 'bite the bullet now and start pulling off the plastic. Stage 1 is to get the rear frame shortened - I got a loop from a shop in Madrid but now I need to find someone to do the welding (it crossed my mind to buy the kit and learn how but having read up I think it may be difficult - so gonna ring around some welders on Monday..
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on April 23, 2017, 09:29:11 AM
Also got a seat from the people in Madrid .. apparently it should fit without too much trouble...
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: MaraudeRS on May 03, 2017, 09:44:44 AM
Sub'd. Please post pics of your continued progress. I like that front fairing you picked out, it should look really nice on your brick.


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Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on May 03, 2017, 06:43:24 PM
Hi.. Thanks MauradeRS..  Trying to find someone to weld up the rear frame loop - that's the starting point .. trouble is I don't have a workshop so I have to wait for a weekend without rain and start the  strip down in the open.. then there will be no turning back -  I'll post pics as I go..  I'm hoping the fairing will look good.. Regards 
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on July 02, 2019, 08:02:43 PM
2 years have passed but I've started - Lopped off the rear frame and decided to bolt on loop rather than weld (because I don't have the skills) .. rear loop I got from a custom shop in Spain needed some 'bending' to slide into frame tubes neatly..
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on July 02, 2019, 08:06:05 PM
Bolts will also provide location for indicator and removable bracket to fix original luggage frame (I want to use the bike for touring - not just posing). 
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on July 02, 2019, 08:15:01 PM
Going for 'Classic' style so got 'off the shelf' aluminum rear mudguard (fender).. Cut it back at the front to form a square 'tongue' which covered in inner tube rubber is a snug fit in the gap under the battery tray negating the need for an awkward  bolt fixing there..
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: DJEwen on July 03, 2019, 06:12:34 AM
Very good. How are you getting on with your "strap ons" :giggles
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: billday on July 03, 2019, 07:28:14 AM
Very good. How are you getting on with your "strap ons" :giggles

They're a distraction. Bike would be a lot further along without them.

ETA: Love that chrome rear fender, it's a great touch.
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: Laitch on July 03, 2019, 09:23:51 AM
Very good. How are you getting on with your "strap ons" :giggles
Don't you mean How are you getting off?
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: DJEwen on July 03, 2019, 10:39:48 AM
Don't you mean How are you getting off?

Indeed.

Dildo's for hand controls must make for an interesting ride...
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on July 03, 2019, 02:32:57 PM
Hi DJEwen - Still struggling with the 'Strap Ons" (SIC) - :) = Sorting the seat next - The seat I bought from Spain won't fit (My bike is lowered by 12mm and I needed clearance for the mudguard/fender under the seat -  anyone wanna buy a unused black dual seat?) - Resorted to making a seat from Plywood - Gonna use the original key lock - It's almost ready to send off to be upholstered...
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on July 22, 2019, 05:49:52 AM
I'm making progress with the seat - next off to be upholstered. Cut side panels from 2mm Aluminium -
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on September 15, 2019, 11:17:48 AM
Just got my seat back from the upholsterer - Fits pretty good using original key lock for easy removal - It's longer than ideal from a style point of view but I want my wife to come on longish rides so a compromise was necessary
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: DJEwen on September 15, 2019, 01:25:25 PM
Just got my seat back from the upholsterer - Fits pretty good using original key lock for easy removal - It's longer than ideal from a style point of view but I want my wife to come on longish rides so a compromise was necessary

No chance of a sore backside on that arm chair.
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on May 03, 2020, 07:15:33 AM
This project was taking forever but now with 'lock-down' I've had time to move it forward -  Made switch plate ..
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on May 03, 2020, 07:25:50 AM
fairing was made to fit a R-bike so had to do a bit of work to make it fit - I think it succeeds in enclosing the otherwise 'too big' instrument console - My main idea was to avoid having to change the speedo/rev counter as from post on here it's not a simple job ..  Now just got to to finish the side panels
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: Laitch on May 03, 2020, 08:09:21 AM
 112350
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: AtLarge on May 03, 2020, 09:39:20 AM
I particularly like that fairing.   112350
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on May 03, 2020, 11:12:46 AM
Hi Atlarge - It came from Flatracer in UK but needed some mods to the mounting 'spider' and trimming of the fibre-glass to get it to fit..  http://www.flatracer.com/bmw-fairings/4583977035
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: MaraudeRS on May 06, 2020, 10:07:16 AM
Lookin good! Glad you’re back at it :popcorm
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on May 16, 2020, 04:36:50 PM
Thanks to lock-down (and masses of advice from people on this site for which I'm very grateful), I've managed to get this build finished ..  Everything seems to work and rode it down the road 100m and all seems okay.. fingers crossed..
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: herseyb on May 16, 2020, 10:13:19 PM
I like that.  Fairing does a great job of blending the gauges in.
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: volador on May 17, 2020, 01:00:06 AM
Bonzer work! Sleek seat looks very comfortable

You give that seat pan a few coats of polyurethane or some type of wood sealer?

The plastic/rubber bits and bobs need some 303 protectant or the such

What color you going to paint it?
Title: Re: 1993 K75 RT Cafe Racer (style)
Post by: 850Commando on May 19, 2020, 03:51:32 PM
Hi herseyb - Cheers -  The whole strategy was to avoid changing the clocks because from what I read (here) it wasn't a simple job.. I think it works - but adapting the R series fairing to fit involved more work than I had anticipated.

Thanks volador - yes - primed and painted the base with Hammerite - I hadn't heard of 303 but googled it and it looks good stuff - I'm getting some - Still trying to decide on final colours - Gonna ride it around like it is for a bit in case any modifications are needed