When I started with two stroke bikes I did small changes on four bikes doing more porting as I went. On my fourth bike I combined the other three and went as far as I could. Every little change does something.
Here’s what I learned so far,
With saws I raise the exhaust port so it opens sooner timing wise. I lowered the intake port so it opens sooner. I widened and polished the intake and exhaust ports. Take baby steps. Opening the exhaust port it exhausts faster/sooner but also super charges the intake port sooner.
Advance the timing if you can.
Listen to the guys here they have been longer into saws here.
For ha’s, ha’s I only cut the piston skirt bottom on a ‘71 ts125 suzuki bike. It was flying past newer Kawie 80’s in the straights. One kid was in tears.