Since then I've replaced my chain with a new o-ring type and use 'chain wax' spray to lube it. I've had the cover off and cleaned it and there's no more 'leakage' near my left foot.
Chris: I'm glad to hear that you've chosen to keep your CB650




Volker_P wrote:Hey Chris, which reason to still care for CB650 engine leaks?![]()
One should mention again that the seal itself is in the engine casing behind the sprocket cover.
I once had oil there from the oil pump cover (also behind sprocket cover). Then it comes out below the three fins of the sprocket cover. In the picture it would be at the level of the front bolt of the exhaust protection
So have a close look where it really comes from to avoid unnecessary work.
To the oil pump: The oil pump cover has a square cross section O-Ring but a slightly oversized circular O-Ring also does the job perfectly since a long time. The original (Phillips) bolts are hard to get out and should be replaced by something reasonable.
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