more power

[josh burden]

a bunch of my friends went riding and we were all flying down a back road, we were all pined against the rev limiter and my brother thinks his 08z400 is slow!? how could u cheaply gain hp and top top speed besides removing the air box and taking the spark arrestor out?

[nighthawk99]

http://www.exriders.com/vbb/showthread.php?s=&threadid=403114

[airmobile101]

Nitrous:devil:

[cataway]

dynatek will get ya 1000 more rpm, change the air boot to a 400ex should get you 2 hp

[dvx440/440ex]

you could also re gear it also what is he runnig against

[jabz400]

i have a raptor 660,kfx 450r,2 other 08 z400"s and a 400ex