ORIGINAL: woolfster2
One thing I have found in altering 2 strokes is to raise the top of the exhaust port a bit, if the bottom of the piston when at tdc blocks the intake port at the top shave it off until it on longer is in the way, Polish everything to a mirror finish, all of the ports, inside the crankcase and what ever else you can see on the inside if the motor. An engine is nothing more than an air pump. The less resistance air has to get in and out will make it a more effecient motor
Nothing in the intake tract should be polished, it should have a matte finish similar to a beadblasted surface or slightly rougher. The exhaust port can be shiny for a bit better flow. You have to be careful about raising ports, it all depends on what RPM the engine is timed to work at. The entire system must be matcehd together to work properly or you get poor results. This means intake timing, intake tract length, case volume, port timing, size and shape and exhaust pipe must all be tuned to work at the same rpm range or power will suffer.
Mark