Rear tire removal

[Bob_Roller]

Justin,

I think the spacer, is the 'hat bushing', or a BMW calls it, a compression sleeve .

It is in the wheel bearing sleeve, spacer stackup .

Items 6 and 11 in the IPC reference .

I believe the outer bushing is longer than the inner bushing .

http://www.realoem.com/bmw/showparts.do?model=0365&mospid=47853&btnr=36_0151&hg=36&fg=10

[Justin B.]

So, I just need to machine a replacement for #6 that is longer by the amount of additional clearance I need and maybe make #11 the same amount shorter?

[Bob_Roller]

That sounds like that would work .

The outer bushing that I have #11, is 12.97 mm or .511 inches in length .

RealOEM shows the inner bushing to be 9.2 mm or .362 inches in length .

[Justin B.]

Bob, are yours offset for a wider tire?

[Bob_Roller]

No, the one I just got, is to install on the rear wheel, that was missing it after the previous owner had the wheels white powder-coated, and didn't install when he reassembled it .

I'm just wondering, if you could just swap the bushings that are already there, it would give you .150 inches additional clearance .

If you do this, make sure you have enough threads sticking out for the axle nut .

[Chris_in_BC]

Copying from Bob Fleischer's web site after a Google
http://bmwmotorcycletech.info/section5.htm

<<""Metric sized tires are what are generally installed.   A 90/90 or even 100/90 on the front, and a 110/90 on the rear.  In some instances SOME 120 will fit the rear; BUT, sometimes (pre-1981 for instance) one has to get the wider 10.7 mm spacer for the right side of the rear hub...BMW part number 36-31-2-301-737.    Stock was 9.2 mm, and was 36-31-4-038-142.    The spacers are VERY easy to install, and do NOT affect bearing preload.  "">>

Looking at MAX BMW site, the spacer part number  doesn't show up under R65 wheels but it does show up if you look at R100RS for 78 on
http://www.maxbmwmotorcycles.com/fiche/DiagramsMain.aspx?vid=51647&rnd=03192010

Justin, I don't think you need to reduce #11, the whole assembly just moves out slightly.

[Barry]

There was a SI issued on tire clearance which suggests use of the 10.7mm spacer if necessary and also answers a question recently raised by bjamesw about how much offset is permissible.  The maximum is 4mm which is a lot less than I had thought it might be.