Does anyone know what the compression would be with a 12to 1 piston in it? Also when the decompression is working how much compression will it let off?When the decompression pin is opening the valve what is the clearance in thousandth?That way i can see it the rocker arm is needs to be replaced.If it is bad how does one go about getting it welded and harded?

New guy

 

most guy on hi comp iston have the decomp pin removed and they have a little blue button you press to release the pressure in the cylinder for easier starting. you can remove the decomp pin and be fine without, its jsut a little harder on your starter, and battery.