some silly questions!!

hi guys, here are some silly mod questions...

1. will a rear brake pump from newer 04' yz fit the old wr400f mounts? :p

2. will a 40mm crf carb bring on any benefits to a wr400 with hotcams and bigbore kit (440cc) or should i just stick on to the 39mm ones...? :p

3. and should i cut holes on the air box to make it breathe better? :applause:

thanks for helping me solve all this mystery !! :):eek:

not sure bout the crf carb, i doubt it would make much diff, could even make it worse, i would stick with the 39mm.

the rear master cylinder should fit, and will eliminate the plastic external resovoir

yes cuttin holes in the airbox will make it breathe better, but u need to be careful about dirt/water entering the air box, put some round plastic inserts and fish filter foam and it should be ok.

remember to rejet cause itl lean out.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now