hey thanx for informing me lol
i kno wat four stroke tech is i didnt kno that they were the initials for it.im 15 and im looking for a job cuz im gonna buy a new 400ex and im building it up with a big wiseco piston not sure wat ratio yet i want at least a 11:1,k&n air filter,dmc alien exhaust,wb rev kit,hot cams cam thats wat i mainly wanna gte for it motor wise so thanx for tellin me that i was wondering wat fst stood for i have a honda fourtrax 300 right now i need something better i got most of the money for it now so its all good