I recently purchased an '00 400ex and was wondering what some good gearing and pipe/jetting combinations are. I do not know much about ATV's, but I do dragrace a motorcycle and am familiar with setting them up. Thank You

 

Call Denton Racing, they'll hook u up. I have a 2000 400ex and put DMC dual exhaust on it. 168 main jet, K&N filter, 6 1" holes in airbox. Really made a difference. It screams. check out my website for some pics. http://members.home.net/umcpmark/index.htm Tell me where u ride and i'll give u some more advice. umcpmark@home.com