Hi, I recently rebuilt a 76 CB200 engine using new pistons, rings, and aftermarket gasket set. All was well and the bike is running well. My problem is I have just noticed a small amount of oil on the lower left hand cylinder fins and I cannot find where on earth it is coming from. The head and base gaskets seem to be ok and the points housing and alternator cover gaskets also seem to be dry. If I wipe off the oil and leave the engine idling with the occasional rev there is no sign of a leak. It's only after a ride out that the oil appears, it starts on the lower front left fins then proceeds to the left cylinder fins ending up blown by the air passing over the oil onto the left side panel. It's not a great deal of oil but it's annoying after doing all the work on the complete rebuild of the bike including a full re-spray. Could there be something I've missed on the engine that could cause this leak. Is there anything near or around the starter motor housing that I should of replaced like a seal or O-ring.
Regards,
Glyn.
Regards,
Glyn.