SPECIAL 30MM SOCKET

[Pete.]

Fair play

I didn't want it to seem that I was disagreeing with you personally, I just don't subscribe to the "Manufacturer is always right" ethos. Granted, BMW do tend to be more diligent than many other manufacturers and their workshop manuals are a wonder of Bavarian matter-of-factness rather than the usual "no serviceable parts inside", but if they did everything right there wouldn't be so many failed pivot bearings or worn-out gearbox shaft splines.

It seems curious to me that they might specify using just an Allen key for the pivot bolt instead of specifying a torque. The shallow taper of the bearings will tend to make them exceedingly sensitive to over-tightening and I wonder if this is the reason some people have them last such a long time yet others have to change them within a few thousand miles?

[dysondiver]

hi .
the allen bolt has a torque specified for it , the lock nut is only as a lock to the allen , so yes it does seem excessive , hence i torqued it lighter , but after checking there was no play , and no restriction i could feel , i was happy enough. the old tighten and keep feeling til the play vanishes method , like old wheel bearings for example seems to make sense , but then with the alloy in the frame and steel in bolts and bearings etc , and the huge temperature variations im guessing they have done their homework .
spline failure is another topic all together , if we start down that route , why didnt they simply put a nose bearing onto the gear box primary input shaft too ,,, but as you say , no ones perfect .

[TD5]

Not sure if you can get these in GB, but down here in OZ these seem to be the go.
http://www2.munichmotorcycles.com.au/pr ... ts_id=5533

[dysondiver]

if they were steel id be more pleased , but ill guess they are tested , and must work ok.
ideas good though.