First, I decided to remove the transmission and clutch for an inspection.
Gladly, I was able to take off the transmission without removing lower engine mounts, but I had to remove the pins for the rear swing arm and take off the rear fender and rear brake linkage.
Well this is what I found (See pics). Looks like oil was running along the clutch rod and working its way through the clutch friction plate.
I am hoping that a new felt for the clutch rod and thrust seal will fix the problem.
If it is the rear bearing seal of the input shaft, is it difficult to change that seal? Do I need to crack the transmission open? The transmission is the only place I haven't gone into on the bike...
If anyone has any more to add, it would be appreciated!
- clutch2.jpg (548.49 KiB) Viewed 308 times
- clutch1.jpg (592.31 KiB) Viewed 308 times
You can search Brook Reams page for Lisle and he uses another style puller to work on the crankshaft seal on one of his bikes:
https://brook.reams.me/bmw-motorcycle-r ... haft-seal/
When putting it back in, carefully clean the area the seal rides on the shaft. It should be put back in flush with the transmission case.
'78 R100/7 '69 R69S '52 R25/2