I just got my '00 XR250 rev box today and installed it on my 400EX.
Well there is no longer a rev limiter on the bike and seems to gain a few RPMs.
The biggest area I noticed a difference was in the top-end.
I still don't know yet if it was worth the $90.00
I will ride it more this weekend!

Randy
'99 400EX

 

is your bike stock or what is done

 

THe bike is basically stock right now except for the usual:
K&N FILTER
155 MAIN JET
White Bros. E-series Exhaust
14 tooth front sprocket

I used to hit the rev limiter in every gear I thought a little too early so this eliminated that.

Randy
'99 400EX

 

Does this one change the timing like the white bros. is supposed to?

 

From what I understand White Bros. is buying these exact parts off Honda and jacking the price up and calling them their own so I would guess it does the exact same thing.
That is what my local Honda dealer told me anyway.

Rdogg
'99 400EX

 

what is the story with the white bros. rev box ever since I put it on my 440 it is very hard to start after it has been sitting over night.