maybe i'm being paranoid about the scuffing but the scratches on the piston and cylinder around the intake bug me.
hmm..i bored the case out with a dremel to get the cylinder to fit. maybe i left some high spots and when the motor heats up it gets tight against the piston skirt causing things to bind up a little bit?
as far as my main being too small, i think that tiny little malossi filter is pretty restrictive. trust me if i upjet it sounds like its slobbering all over itself.