How much power?

[TheBlasterMan]

1999 400ex

big bore kit, manufacturer is unknown
stage 3 cam
yoshimira full exaust
high compression 12.5 :1
and thats about it

How much power can i expect from a 400ex with these mods?

how big is the big bore kit

[TheBlasterMan]

440, my bad, lol

im thinkin 34-37

[04exrida]

prob between 40 and 45.

a carb will help.

I dont know what you are getting at, but you may need to hop up on the clutch and stuff.


I woud guess at somwheres between 35 and 42. what about port and polish, that may make a big diffrence.