I thought I would see if any one out there has experienced a problem like mine. I have a newly rebuilt 1967, 650, it is still in the process of running in. When first started there is a lot of white (oil) smoke almost until the engine clears itself out, it then runs really strong but smokes when letting off of the throttle. I pulled the head off to find that the rocker boxes were almost swimming in oil and that there was approx. 1 tea spoon of very fresh clean oil on top of the pistons. This seems to indicate that oil is leaking through or around my valve guides. Every thing is new and looks good. I'm stumped. Is there such a thing as top end over-oiling? Any advice would be appreciated.Thanks,MHofmann

All the oil in the head drains back to the crankcase via the push rod tubes and then through the tappet blocks. Two small holes in each tappet block. I don't recall the 650 having any more drains than that but double check. Check oil line routing (ALL), crankcase and oil tank vent, engine oil overfill (check after road ridden half mile or more). After parking for a few minutes, even if you have too much oil in the head, the oil should drain down. After running/riding put it on the side stand, pull both of the left side rocker covers. If oil pours out of one of them, thats the side thats not drainging down (intake or exhaust).

YES! you can over oil. I had a problem on my 67 Bonnie chop with a restriction in the fitting on the oil tank which caused way too much oil to go to the top. eventually all of it was in the sump and none in the tank. Pat Ottobre.

Sounds like a head gasket issue, where oil is migrating into the cylinders.