yamaha 450 No top end

[smikeals81]

I own a 2006 yzf 450. I was wandering if anyone knew why i have no top end. strong bottom end. Timing been done. jetted right.

[Midwest Trail Rider]

What kind of mods are on it. Sproket could be the problem. Lots of pipes are tuned for low end grunt instead of high end power and that could make a big difference. Cams would be the same way. Just all in the tunning if it's not stock.

[REEDracing94]

are you tlakin bout yfz quad or yzf bike....on a yfz quad as long as you have 20" tires you should still have top end with any pipe...check the clutch plates