With an RCR stage1 kit on my trailboss 325 i have kind of ran out of bolt-on parts but need more speed! There are a few thing i can do though although i dont know much about them. One would be a full clutch kit rather than just my green primary spring. Would this make much of a difference? Or how about porting the head or maybe a new camshaft. RCR sells a cam for 100 somthing bucks. Does it only work well with his bigbore kit??? How much work would be involved in either of these?

 

sell it and buy a sport quad.

 

Sounds like you might need to go to a different quad before to long. No amount of mods will make it fast; it’ll just suck a bunch of money out of your wallet with no real results.
Been there, done that.
Sounds like you’d be better off with a Scrambler, they respond well to mods.