I have an 88 xr 600 r and it leaks some oil from the base of the clutch release lever on the top of the left side crank case. Any ideas on how to fix it? I believe it is just a worn washer, but can't figure out how to remove the clutch release arm to replace it. Does it require removal of the crankcase cover, or can it be removed without doing all of that? It doesn't mention anything about it in the Clymer manual.