My flywheel is 4,6kg , this is a good compromise, i think. I reduced the main jet size from 110 to 105, and now i have an air/fuel ratio of 13:1 up from about 2700 rpm. Idle-mixture is 14,5:1. But the problem is between those two points, at the change-over (help me: Is it called so?): With a little throttle the mixture runs down to 10:1.
How much valve clearance should i give to this cam? Now it's 0,20/0,24mm. Ignitiontiming 15° ? I don't want to risk overheating.