I seen and measured the 2100 cylinder that was ported by a husky rep. I made changes to a few husky dirtbikes one at a time. On my final bike I did all the changes in the ports one shot. Open up the transfers, raise the exhaust port, widen it, arch it, lower the intake port, which changed the port timing, polish it all. Advance the timing. The engine reaction time to the throttle movement was right there. It’s like the engine knew you were going to rev it ahead of time. The mili second response.
Drag racing down the straights she beat everything. Me and the oldtimers would laugh watching this old 81 husky 250 cr bike. My point is I hear a lot of people say porting doesn’t work. Just a little porting goes a long way.