I havent jetted my quad yet. I've heard i neeed to up the main by 2 and stuff but i dont know anything about that.it's lean from the pipe& air filter.i'd like to do it without buying anything. IE dynojet.


oh yeah I know a guy with a 400ex.he's wanting to drag race and we'd probably get close to topping out if we dont.how would i compare once my jettings right? he's stock