400ex rev box......

[timp224]

I have a 2007 400ex with a stage 2 hot cam, open air box, jetted, full exhaust and was wondering if a rev box would be a good upgrade? has anyone installed one of these? Is it worth the investment?:huh

[honda400ex2003]

I personally dont like them too much unless it is on a built motor that can rev that high and have power there. the 400 does not make any good power that high without heavy mods so it is really a waste unless you just want to go faster with the higher limiter. if you get one with a different curve or timing advance it is better since it does actually give you better performance. it would be like adding a sparks key or programming a map to fit your machine better. good luck, steve

[deathcorefan2]

arent most rev boxes for a 400ex just XR250 Boxes with a sticker?

can you just buy the rev box off of an xr250 and it be the same?

Originally posted by deathcorefan2
arent most rev boxes for a 400ex just XR250 Boxes with a sticker?

can you just buy the rev box off of an xr250 and it be the same?


ding ding ding...we have a winner

[dustin_j]

my brother's "White Brothers" CDI box was an xr250 box with "WB" scratched into the side of it...I wonder how much money White Brothers made on these boxes?

[deathcorefan2]

Originally posted by dustin_j
my brother's "White Brothers" CDI box was an xr250 box with "WB" scratched into the side of it...I wonder how much money White Brothers made on these boxes?

a lot.

im going to find how much a stock xr250 box goes for.