basic two stroke whipper snipper or chainsaw tuning(porting)is easy,no head work involved,get an old running whipper snipper,remove the piston and where the intake part of the skirt opens and closes the port,take an arc shaped cut about half a mill of the skirt,itll lose bottom end torque but itll rev higher and might start spitting fuel back out the carb at low revs,this is where reed valves come into play on dirt bikes,if you want to go further, on the barrels exhaust port,take about half a mill of the top edge of it,and remove any spark arrestors in the muffler,you might have to bend it open and closed to do this,make sure the rings wont go into the final hole before you do it,it might not idle well after but this is where head porting can take you,basic rough two stroke tuning,your results may vary,transfer ports and scavenging are a different matter.
