I just destroyed my last comments by pressing a series of wrong keys, however the thrust of it was- the cam grinding is obviously no more, hence skirt clearance needs to be much more to compensate.
I see this as the main problem.
so more or less--- lots more overall clearance is necessary.
pancho.
Whoever measured the piston before they honed the cylinder would detiermine the cam on the piston. The clearence at the bottom of the skirt is what needs to be measured. all the ovality is in the top of the piston, the bottom of the piston,(well there is only the front and back) is round.
Mick said the answer already your jetting is the problem.
