Thanks. By 'mod' to you mean port grinding/modification and possibly changing the squish? I have not done any of this but I have opened up the muffler. This helped noticeably.
-Don
Mods vary like anything else.
But, yes my mods are somewhat like you stated. I widen and raise my exhaust, widen and lower my intake, gut lower tranfers, finger port, remove base gasket, shoot for .018-.021 squish, add another port on the muffler along with ported face plate (totallying 3 ports) add an aftermarket filter system and advance the ignition.
All is just my preference.
But all of that is not totally nessecary. There are many saw builders, some of whom are sponsors here. They know much more than I do.
I just do my own stuff.