what you guys are working on shows how restricted these saws are coming from the factory. the question is do the manufacturers do it on purpose? or are they to ignorant to know the difference? or is it a EPA issue? either way i think you guys stumbled onto a very lucrative idea. since mankind got anything motorized the urge to customise had be vast, everyone wants to go faster, cut quicker, you know the drill. peace be with yous
Based on my experience with 2-stroke bikes, it should be very similar IF the cooling is still adequate. There's going to be more heat made due to the increased horsepower. Depending on how restrictive the stock muffler is, sometimes that can be offset by the freer flowing exhaust. I have an old 1967 Kawasaki with a pipe like this, and it's still drum-tight on the stock rings. I can and do hold the throttle wide open without rest going up long hills in top gear. But not every engine and pipe combo will be happy doing that. My Kawasaki came with a pretty restrictive and hot-running stock pipe, and very good cylinder cooling. Something that cane with marginal fins but a relatively free exhaust might see trouble with a pipe. If the pipe and/or porting causes the engine to get run at a faster RPM, that will shorten the life of the piston and rings for sure.
