How can I get more top end power?

[onelik]

So I bought a 2011 yz450f and I read many reviews on the 4th and 5th gear being flat so I'm trying to figure out how I can get more 4th and 5th gear power for those long wide open desert rides

[onelik]

forgot to mention this bike has a serious hit in first second and 3rd gear it responds excellent with the twist of the throttle

[yz450fcranker]

go downilll on 4th and get it to redline and shift to 5th it should be going pretty smooth lol get an exhaust pipe a k&n filter and a 50 tooth rear sprocket

[grayracer513]

The OEM muffler seems to be the limiting factor on the '10/'11. They use a sudden reduction in diameter at the end of the outlet as a noise cheat, and it ends up clipping power on top. The header, OTOH, seems to be just fine, so a well made slip-on is usually enough.

[onelik]

what kind of slip on do u suggest

[Aicon YZ450F]

I put a FMF GYTR on mine and it opened up the top a little. If you don't mind spending a extra few bucks put on a yosh

[grayracer513]

MRD, Yoshimura, ....

[APlusAutoParts]

i have a 50t rear sprocket and pro circuit exhaust and mine hits better on top now

[Steel Panther]

are you looking for more "hit" at the top of the rpm range or more speed?

[onelik]

More speed.

[Steel Panther]

if your looking for more top end speed a slip on exhaust may help a little, but gearing is the way to go. Try going down a tooth or 2 on the rear sprocket size.

[Duner185]

If i was buying a new exhaust i would go with the FMF they have great top end one of the cheapest places i found my is at this web site. here is a link then in the search type FMF

FMF