Centrestand with wider wheel

[aces59]

Sorry I'm probably covering old ground but....
Have a K75S and have fitted a larger rear wheel and radial tyre - 4.5x18" 3 spoke. Fits easily even with tragkorb mounts if I remove the silencer. BUT - Centrestand doesn't fit - left side hits the wheel. I read that the K1100 stand fits - bought one and cleaned and painted it - doesn't fit !! on both it's the left (silencer) side leg probably about an inch interference.  I have cut up the old K75 stand to see if I can weld it up. Now running with the old stand mount and (strengthened) sidestand only. Have I missed something? Is there another different stand out there? People have done this before - what's the accepted solution?

[pablooo]

If I remember correctly, there's two different center stands as you said but they are different in that the k1100 center stand is angled at the bottom of the legs rather than curved at the bottom of the legs of the older center stand. Take a picture of the one you bought to confirm?

[Laitch]

I read that the K1100 stand fits - bought one and cleaned and painted it - doesn't fit  Have I missed something?

Can you supply a link that affirms the fit of a K1100 sidestand on a K75 with an 18" rear wheel and oversized tire? What's the tire size?

[aces59]

Hi. Looking around now I can't find anything specific but what I remember was words to the effect that the old K75 didn't work but the later K1100 ones would. and the K1100 are all the same. Tyre is a 160 profile on the 4.5x18 rim. Logically the frames are the same or similar as are the gearboxes so the stand originally used with the wheel ought to work? Anyway – My original stand is going through a six billion dollar man transformation at the moment which should see it useable by the weekend. Anyone want a cleaned and painted K1100 stand?
Steve

[Martin]

Are you sure the new stand is off a K1100. http://www.k100-forum.com/t2713-wider-wheels-radial-tyres-on-a-k100#22788
Regards Martin.

[aces59]

Martin. I sent several hi-res pictures to James Sherlock (A well known BMW expert) and he confirmed what I had was a K1100 stand. and I bought it from a breakers who were breaking the whole bike so should have known. The thread you show is probably the one I read before and certainly seems to suggest it works - with a bit of trimming. On mine it looked like it needed a lot more cut out. I have attached the pictures I sent in case you have anything to compare it with.
Cheers
Steve

[Laitch]

Hi. Looking around now I can't find anything specific but what I remember was words to the effect that the old K75 didn't work but the later K1100 ones would. and the K1100 are all the same.

I don't trust my memory much anymore and in this case, yours either. :giggles

I think your recovered memory might be in reference to 17" diameter wheels and the K75. You are using an 18" diameter wheel with an oversized tire, I think. What is the size of the tire that you are trying to impose into this scheme, or are you keeping it a secret because it's part of a proprietary formula?

[aces59]

It's a 160 profile tyre on a 4.5x18 rim (three spoke). Bridgestone BT023. Will check exact size when I get home
The thread listed by Martin looks like at least part of the information I had worked from but it's obviously not the same recipe as mine. 

[Laitch]

It's a 160 profile tyre on a 4.5x18 rim (three spoke). Bridgestone BT023. Will check exact size when I get home
The thread listed by Martin looks like at least part of the information I had worked from but it's obviously not the same recipe as mine.

You read this part of the post?
The K1100 centre stand is not necessary, in fact the left 'foot' rubs the left edge of the tyre, so it has to either be ground away or made to stand off a bit with a thicker rubber spacer. (See updated post below)

[aces59]

Yes - Also the bit about cutting 20mm off. What does 'not necessary' mean in this context  do you think? I don't find the information consistent.

[Laitch]

What does 'not necessary' mean in this context  do you think? I don't find the information consistent.

From my experience, "not necessary" means "not needed" which, in the context of that modification, would also mean that he believes the original K100 centerstand would function with the new setup.

The information he provides seems clear to me. He wrote that he was breaking new ground by modifying his K100 this way and you are breaking new ground for yourself by modifying a K75 in this way, if you're successful.

[aces59]

The thing that itches is that there are plenty of standard BMW's around with wide 18" wheels and working centrestands. What's different?
Steve

[Laitch]

The thing that itches is that there are plenty of standard BMW's around with wide 18" wheels and working centrestands. What's different?

Geometry.

[aces59]

no really - whats different? I'm thinking it has to be either Gearbox casing or swinging arm?

[Laitch]

no really - whats different? I'm thinking . . .

Really. You'll need to measure your way out of this conundrum; thinking is only part of the work.

[aces59]

You're a cruel and heartless man :-)
As I garner more info I will report back up
Cheers
Steve

[wally.fisher]

You're a cruel and heartless man :-)
As I garner more info I will report back up
Cheers
Steve

Going wider will  affect the centre line between front and rear wheel, I'm not entirely sure that a 160 tyre will fit without mainstand or swing arm mods.
Good luck though, post up some photos when done.


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[Martin]

I don't know whether this will help?  http://www.largiader.com/parts/wheels.html
Just to clarify the LH side of the tyre hits the stand the RH side does not. How much more clearance do you need? Do you have spacers fitted to the wheel? Would trimming the feet on the K1100 stand fix the problem? Have you tried putting the stand on loosely retracting it and then tightening the bolts?  :dunno Remember to every solution there is a problem.
Regards Martin.

[wally.fisher]

You read this part of the post?
The K1100 centre stand is not necessary, in fact the left 'foot' rubs the left edge of the tyre, so it has to either be ground away or made to stand off a bit with a thicker rubber spacer. (See updated post below)

Or. You can remove the centre stand but leave the side stand . It's only two bolts. Just saying.


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[aces59]

yeh - That's where I am at the moment - But I really like having a centrestand. By the way - those two bolts are absolute Ba$*ards to undo. I think BMW use a strong studlock compound - Had to resort to my friend the Gas Axe to loosen them. Took the opportunity to ream the pivots and made up some new spigots in brass to match - also tapped the oil holes M6 and fitted grease nipples. Just need to weld a new pad on the end of the left hand leg and I'm back in business :-)
Steve

[aces59]

OK - Wheels in and stands on. As this may be of interest to others I am going to start a new thread to make it easier to find.
Steve

[aces59]

Post removed and recreated as a new thread.