MOPED ARMY

Hello?? ANYBODY..>!!!! HELP!!!

fixing to get a cosmo m'self next week. how fast are you running now? the one I test drove ran 42-43. looked like it already had an expansion chamber style exhast. looked just like a biturbo. want to get one like dude in the included pic did to his sachs. if this is what yer going to, maybe 5mph more than stock. biturbo is worth 5 over a 'straight' pipe, true expansion chamber like in pic is worth about 5 over the biturbo. 2 strokes use the SHAPE of the pipe to make power just a much as the VOLUME (internal size basicly)of the pipe. If you want more details, e-mail me, I'll find some links on expasion chamber design and theory for you.