Author Topic: Fitting a RnineT front wheel to a K75 1988  (Read 3380 times)

Offline Flodabo

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Fitting a RnineT front wheel to a K75 1988
« on: October 03, 2018, 02:41:05 AM »
Good morning,

I hope it's ok to start a new topic. I've searched the forum but could not find any info.

Does somebody have any experience or info/ideas on how to fit a 17" RnineT front spoked(wire) wheel to a K75 from 1988 no ABS? I also have a 1150GS rear wheel but that i heard that it's a simple swap, although I don't know if caliper or brake disk need any modifications in terms of new old parts.
I have the K75 stripped down of any unnecessary parts and plan is to go for a racer/endurance look.
Hope everyone has a nice day outhere, cheers!
 
  • on my working bench
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Offline johnny

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #1 on: October 03, 2018, 07:08:11 AM »
greetings...

every component needs attention... all it takes is some material... some tools... some machining skills... some fabrication skills...

j o

  • :johnny i parks my 96 eleven hundert rs motobrick in dodge county cheezconsin  :johnny

Offline Laitch

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #2 on: October 03, 2018, 08:16:12 AM »
I also have a 1150GS rear wheel but that i heard that it's a simple swap, although I don't know if caliper or brake disk need any modifications in terms of new old parts.
Welcome, Flodabo. Tell us about your moto—how long you've had it, how much you've ridden it, how many kms are on it, how well the engine runs. Post some images of it.

Perhaps somebody has done your exact conversion and will chime in here but you can work out what might be obstacles. Some of the items governing the feasibility of your project are the diameter and length of front axle, the width of the proposed rims, the width of the proposed tires, the distance between the current fork sliders, the relationship of the brake rotors on the wheels to the calipers, and the clearance of the proposed rear wheel and its tire to the swingarm. Understanding possibilities is a product of measurement. Measurement of clearances your first task. If you heard that somewhere that the 1150GS wheel is a simple swap, you should track down that reference then develop it to be certain you are not chasing ghosts.

This classic Stuntex videos shows some obstacles and how they were overcome during a K1100 conversion. If necessary, the video can be auto-translated into captions from Russian to whichever language is convenient. Your K75 might constrain your choices somewhat.

  • Along the Ridley in Vermont.
  • 1995 K75 72,000 miles
I wept because I had no radials until I met a man who had no splines.
https://tinyurl.com/RillRider

Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #3 on: October 03, 2018, 01:14:19 PM »

Awesome YouTube clip! Will come in handy!

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Offline bocutter Ed

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #4 on: October 03, 2018, 01:54:37 PM »
You'll probably have to swap bikes to 'find' carburetors.  Or convert from fuel injection ...  :giggles
  • Toronto, Canada
  • '61 Puch DS60 - '66 Puch 250 SGS - '87 BMW K75s

Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #5 on: October 03, 2018, 02:21:11 PM »
So those are not carburetors? The 3 thingy under air box?
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Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #6 on: October 03, 2018, 02:24:17 PM »
Air box- air intake hmmm
Any idiot proof bike out there? I need one
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Offline Laitch

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #7 on: October 03, 2018, 03:52:55 PM »
Air box- air intake hmmm
Any idiot proof bike out there? I need one
As far as the air box is concerned, it is used for collecting and channeling air through filtration and electronic sensors to throttle bodies where air is distributed to combustion chambers. Carburetors mix filtered air and fuel outside combustion chambers; the K75 fuel injection system adds the fuel within combustion chambers based on data incoming from sensors.

In the search for an idiot-proof bike, buying a neglected and non-running K-bike is a perfect choice if riding is not intended and protection from accidents is the goal. Smoke and fire are always possibilities though, as you have discovered; however, a well-run K75 is about as idiot-proof to maintain as a bike can be, if riding is the goal. Idiots still are advised to leave some repair and maintenance—and perhaps all riding—to non-idiots; but they are welcomed as sponsors. :giggles
  • Along the Ridley in Vermont.
  • 1995 K75 72,000 miles
I wept because I had no radials until I met a man who had no splines.
https://tinyurl.com/RillRider

Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #8 on: October 03, 2018, 04:18:59 PM »

Have a good night you all :)
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Offline Laitch

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #9 on: October 03, 2018, 04:57:31 PM »
You’re like a wizard of a wisdom land if there were to be one.
Yep. That's me. Ask anyone.:BW:
  • Along the Ridley in Vermont.
  • 1995 K75 72,000 miles
I wept because I had no radials until I met a man who had no splines.
https://tinyurl.com/RillRider

Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #10 on: November 14, 2018, 03:35:04 PM »
Hi everyone!
Here’s some updates on my work so far :
Front wheel is on but need to work on axle bushes. I have still to fabricate some brackets for the new calipers. I would like to use aluminum for the brackets, will see.
Fork yoke from Twisted Brothers. strap-ons from Cafe4racers. Original instrument bracket I’ll try to use as bracket for the front fairing.
Have some new Bosch injectors. Do they need some tuning? Will this swap affect idle?
New old k1100lt gearbox with final drive from same model.
Rear wheel fitted. No modifications needed. Except for the final drive lock(cap?) which is from a r1100gs and that one came with a caliper from same bike (or at least same model).
New rear shock and some awesome Pirelli MT60RS.
Motogadget Munit in progress. Looks like a mess but I think I came around most of the big issues. Still need to cut useless wires and relays from old harness. I did not had the guts yet :)
I’m thinking about modifying fuel tank. Give it a more straight line at the base. Will see.
What are your thoughts so far?
* image.jpg (70.35 kB . 768x576 - viewed 177 times)
  • on my working bench
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Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #11 on: November 14, 2018, 03:36:50 PM »

* image.jpg (69.1 kB . 768x576 - viewed 176 times)
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Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #12 on: November 14, 2018, 03:38:02 PM »
Sorry for this mess
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Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #13 on: November 14, 2018, 03:39:08 PM »
K1100lt gearbox and drive
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Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #14 on: November 14, 2018, 03:40:34 PM »
Rear caliper and gs lock(cap?)
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Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #15 on: November 14, 2018, 03:42:56 PM »
Munit and a nice headlight from caferacersunited
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Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #16 on: November 14, 2018, 03:53:16 PM »
And the front fairing. Will need to fabricate some bracket for this cause I can’t find anything on the web that I can modify to fit . I’ll keep that for last maybe.
  • on my working bench
  • k75s 1988

Offline Laitch

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #17 on: November 14, 2018, 07:39:44 PM »
What are your thoughts so far?
You've made significant progress. Did the engine of this moto run well before you started remodeling it? Did you ride it much?
  • Along the Ridley in Vermont.
  • 1995 K75 72,000 miles
I wept because I had no radials until I met a man who had no splines.
https://tinyurl.com/RillRider

Offline bocutter Ed

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #18 on: November 14, 2018, 08:00:32 PM »
And the front fairing. Will need to fabricate some bracket for this cause I can’t find anything on the web that I can modify to fit . I’ll keep that for last maybe.
I'm pretty sure the upper (pointy) bolts from the original bracket also hold the 'fluid-bloc' in place ...
  • Toronto, Canada
  • '61 Puch DS60 - '66 Puch 250 SGS - '87 BMW K75s

Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #19 on: November 15, 2018, 01:08:09 AM »
You've made significant progress. Did the engine of this moto run well before you started remodeling it? Did you ride it much?
Hi Laitch
I had bad idle in both cold or warm engine. Had to keep engine on with throttle. Valves?
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Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #20 on: November 15, 2018, 01:09:46 AM »
I'm pretty sure the upper (pointy) bolts from the original bracket also hold the 'fluid-bloc' in place ...
Bocutter please elaborate. Fluid bloc?
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Offline Laitch

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #21 on: November 15, 2018, 01:17:02 AM »
Bocutter please elaborate. Fluid bloc?
Let's have this guy elaborate while Ed is resting.
  • Along the Ridley in Vermont.
  • 1995 K75 72,000 miles
I wept because I had no radials until I met a man who had no splines.
https://tinyurl.com/RillRider

Offline Flodabo

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #22 on: November 15, 2018, 01:29:22 AM »
Thank you!
I’ll have a look into that as soon as I find proper tool to unscrew the top nut on the fork tree so I can get to the bearings(needs to be replaced) and have a look at the “fluid-bloc” too.
Love the guy in the video:))
  • on my working bench
  • k75s 1988

Offline Laitch

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #23 on: November 15, 2018, 01:45:35 PM »
Hi Laitch
I had bad idle in both cold or warm engine. Had to keep engine on with throttle. Valves?
You should perform a thorough tune up on your used moto that includes valve adjustment, throttle position sensor adjustment and throttle body balance once you have thoroughly cleaned and tightened all electrical/ground connections, cleaned or replaced the air filter, replaced the fuel filter, and verified that the fuel pump works well.

There is no way to tune fuel injectors. They can be cleaned and their o-rings replaced. Be certain their electrical contacts are clean.
  • Along the Ridley in Vermont.
  • 1995 K75 72,000 miles
I wept because I had no radials until I met a man who had no splines.
https://tinyurl.com/RillRider

Offline Chaos

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Re: Fitting a RnineT front wheel to a K75 1988
« Reply #24 on: November 15, 2018, 02:38:01 PM »

Love the guy in the video:))


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1987 K75S    VIN 0231
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