Who makes the best rev box?

[400exstud]

Who makes the best rev box?

i would say big gun cuz it gives u 1 hp some how.

[RiderTRX400ex]

gives u 1hp??

big gun claimes ther rev box gives a 400ex 1 more horse power but on a 400ex their useless cuz a 400ex stops making power in the 8000 rpm's so that extra 1000rpm is useless at less some one cant shift right.

[stc416rider]

yeah ive heard dont use rev boxes bc sometimes they r hard to start

[icy1155]

Rev boxes are useful in the bigger bores according to people who know stuff(not me)

[cals400ex]

with an aggressive cam, they are useful. i would get the gt thunder one. if price isn't a concern, look in to msd.

[2muchquad]

i wouldnt doubt it if all of them came from the same company

[bradley300]

Originally posted by 2muchquad
i wouldnt doubt it if all of them came from the same company

the white brothers and big gun do come from the same company, HONDA. its a stock xr250 box, which is a kickstart. something about that is why you get the starting troubles when put on a electric start 400ex. curtis sparks and gthunder make there own and neither have any starting issues. i suggest the gthunder. i beleive he even has a few different boxes (different power curves) so you can choose what fits your needs

and yes, the 400ex stops making power well before the rev limit, so unless you have a cam and porting that is set up to rev REALLY high, a rev box is useless unless it alters the power curve before max rpm or moves max power past the stock limit

[400exstud]

I do realize that i won't have s*** for power up top but all I want is a couple mph for lake running. It would still wind out good right?