Hey guys I just bought a KFX 400 today and wanted to see what kind of exhaust you guys with Z400's are using? Which exhaust gives the biggest power increase...I've heard bad things about the Yoshi yet when I bought the bike today that's all the dealer could talk about?? Thanks for the help!

 

Get the Jan and Feb issues of ATV Rider. Among the "quiet" pipes (Jan issue), the Yoshi full system did the best. The Feb issue is supposed to have a preformance piipe shootout. I have the FMF PowerBomb and Titanium-4 (17" AMA legal), plus a K&N and vented airbox lid, and am very pleased. Nice increase in low end torque, and top end is great too.