Chainsaw Repair

Machining specs:
For some reason this thread says my diagram file is too big!? so I can't post it...
So to machine the piston top you must simply-
Machine the squish area on top the piston 10mm wide,040"(1mm) deep,then machine at 45 degree angle the small step where machined squish meets unmachined dome.  While the piston is still spinning in the lathe smooth the entire piston crown with,400,then 600 grit emery,then finish with metal polish and a cloth,try to get a mirror finish,piston will run much cooler.
The intake skirt is narrower than stock,so do not widen the intake port before you install this piston,then measure how much is allowable.
This piston assembly is far lighter than stock,taper-boring the wrist pin will lighten it further.