what do i need

[EX400rider]

What all could i put on my EX400 to make it run as fast or alittle bit behind a 450r.

I dont want to bore it out .

[nowukno]

What have you done so far?

[2004exrider]

14/39 gearing
rev box or curtis sparks advanced timing key
K&N or UNI filter
Lightened flywheel (but ive heard you loose topend)
Take your airbox lid off and rejet
Aftermarket exhaust, HMF, Big Gun, White Bros, etc
Aftermarket cam, Hotcams stage 1
High compression stock bore piston. 11:1 you can still run 93, 12.5:1 you have to run race gas.
these should help you kinda keep up w/ one, but the 450 will still smoke ya.:cool:

Jimmy