After dismounting the clutch and chain case I found the oil leak. The oil comes out of the main shaft (bearing) of the engine. Is this ''easy'' to repair or should I go to a professional? I have a picture of it but don't know how to post it.
Hi Ralf..There aren't normally any problems with leaks at the main bearings unless the bike has been stood for a while. It can then gradually drop the oil into the sump and it can leak through the main bearings when it reaches that level in the crankcase. Has the bike been left standing for a while?...Ian