Champion 6.5 Clone

[mitchG]

I have a Champion 6.5 horse motor i am going to put on my minibike what is the best mods for a clone engine for speed and stuff like that

 

[Bluethunder3320]

this explains it the best

http://www.affordablegokarts.com/performance_basics.php

 

[mckutzy]

I have that same motor. I just put on a custom made exhaust and made a modified air filter adapter from a stock filter. of course there are more you have to spend some money on them though. An exhaust is a good start though.