Struggling with my Villiers 75cc Lt Weight Aluminium engine. It has a mechanical governor mechanism fitted. Some odd balls found when restoring (previous bodge jobs)...but here is a general question.
How tight should the crankshaft be after the crankcase bolts has been tightened? Valves have been lapped and re-are fitted, head is off. The only thing that I can think is that in tightening down the crank case, it is putting undue pressure onto the end of the camshaft drive. Currently, I need two hands strength of grip to turn it so that the piston goes up and down! Is that normal?
I attach some images......