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Topic-icon 1990 R100gs clutch

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2 years 2 weeks ago #2431 by 14991
1990 R100gs clutch was created by 14991
Need help clutch won't release. Put in new clutch and plates and spring and new push rod. The push rod is to short with tranny installed.

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2 years 2 weeks ago #2432 by 1872
Replied by 1872 on topic 1990 R100gs clutch
There is a push rod, a round bushing, a bearing and a piston that make up the clutch release assembly. Unless you have an incorrect part, there must be another problem.
When pulling the handlebar clutch lever, does it move the end of the piston? Is the clutch cable adjusted according to the instructions? Is this a stock clutch or an aftermarket or a Southland?
Clutch disks have been known to stick and not release, but normally only after sitting for a while in a damp environment.

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2 years 2 weeks ago #2434 by 14991
Replied by 14991 on topic 1990 R100gs clutch
It started with old clutch. Put new clutch in complete and new push rod the throw out bearing is good. The throw out bearing or piston does not extend out to end of transmission at least1/8" inside. I checked a 92 and it sticks out past the end of the transmission. I was wondering if it could be a bad flywheel or crankshaft end play.

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2 years 2 weeks ago #2435 by 14991
Replied by 14991 on topic 1990 R100gs clutch
It is a stock BMW clutch

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2 years 2 weeks ago - 2 years 2 weeks ago #2437 by jagarra
Replied by jagarra on topic 1990 R100gs clutch
You indicated the issue started with the old clutch in there. If you replaced all the pieces of the clutch assembly and the still the problem is there it has to be in either the transmission , linkage or motor. I am not sure when the circlip mod was made to the transmission, maybe someone will chime it but maybe there is a shaft that is moving. How did the input shaft feel when you had the transmission out? Did you replace the diaphragm spring part of the clutch, that seems to create the stopping point for the release rod?
Last edit: 2 years 2 weeks ago by jagarra.

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2 years 2 weeks ago #2438 by 14991
Replied by 14991 on topic 1990 R100gs clutch
The input shaft looks and feels good. It does have a new diaphragm spring. I am thinking the flywheel or crankshaft end float it seam like the spring is to far away from the transmission

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