Hi all, long time lurker here, normally by scouring the threads I can find any information I might need but I'm drawing blanks with this one so far . . . .
I am currently rebuilding the gearbox on my 94 R 1100 GS, it had an output shaft bearing failure that luckily I caught in very good time ! Internally, there is almost no wear anywhere, but whilst in there I am considering replacing all the bearings to so called 'clean' deep ball race ones. . . .The input shaft has the original taper roller bearings on each end, I measure their depth at 16.25 mm each, the ''problem'' is the replacement ball races are only 15mm deep each ? !
Clearly I need to shim these up, but how much by ? Does anyone know the recommended endfloat for this shaft ? Should I shim between the shaft / bearing inner or perhaps between the outer race and the casing itself ? I am aware the taper rollers were scrapped due to premature failures, caused in part by too much preload on the tapers ? From the wear the bearings show, the casings were definitely squished up tight ! 
The bike has about 80,000 miles on it and had been running well until recently, should I maybe just replace like for like and call it good ?
Questions, questions ! Any advice on this matter would be much appreciated, I especially look forward to hearing from anyone that has direct experience or even done this 'mod' themselves ! Or please point to me a relevant thread !
Many thanks in advance
I am currently rebuilding the gearbox on my 94 R 1100 GS, it had an output shaft bearing failure that luckily I caught in very good time ! Internally, there is almost no wear anywhere, but whilst in there I am considering replacing all the bearings to so called 'clean' deep ball race ones. . . .The input shaft has the original taper roller bearings on each end, I measure their depth at 16.25 mm each, the ''problem'' is the replacement ball races are only 15mm deep each ? !
Clearly I need to shim these up, but how much by ? Does anyone know the recommended endfloat for this shaft ? Should I shim between the shaft / bearing inner or perhaps between the outer race and the casing itself ? I am aware the taper rollers were scrapped due to premature failures, caused in part by too much preload on the tapers ? From the wear the bearings show, the casings were definitely squished up tight ! The bike has about 80,000 miles on it and had been running well until recently, should I maybe just replace like for like and call it good ? Questions, questions ! Any advice on this matter would be much appreciated, I especially look forward to hearing from anyone that has direct experience or even done this 'mod' themselves ! Or please point to me a relevant thread !
Many thanks in advance
