tree buddy.. i tell u what hese fellas not been forthcoming with how to port a saw.. but ill tellu anything u need o know..firs u go get 2 -1 by 3/4 copper adapters.putem on the muffler so i looks good.. get u a drill one size bigger than the exhaust port,,an drills it real good..
then get u wifes dirt devil an vac all at stuff out the cylinder..slap u muff back on
there an u ready..dont crank it tho .. put it forth rite on ebay as a ported saw . never crunk.charge at least 50 dollars more than a nw saw price an somebody u go for it..it helps if u move around a lot if u gon do this..oherwise u costomers will all want to pay u a personal visit..
ok ,,porting to the best o my knowledge
just opens a saw up and sets ever thing,, timing etc at its optimum.u question is an honest question but it aint a real good answer to it,,as different porters probably skin the cat different..,hope u dont mind me playin atchu id rather laugh as cry ,,and its one or t other these days..good luck..