I know you've seen too many kits from the factory or from shipping or from whatever with casting defects, warped barrels, factory porting gone too far into the stud holes, misaligned iron bores, bent skirts, asymetrical transfer timing, other random terribles yada yada yada i guess quality control isnt what it used to be. some of the things i do to EVERY kit since my first kit is the ring gapping, chamfering, leveling flanges for airleaks, strong wiring and other secret piston mods. Cant stress these ones enough boys and girls. Little attentions to detail will either make or break your bike. Too important to overlook because if ya dont know do some research! so kiddies prep your kits properly, and they will love you. ive been reading 2-stroke handbook recently cant ya tell?!
For all you cheap bastards myself included. thanks Gordon Jennings!
http://www.datafan.com/TunersHandbook/2-strokefiltered.html