rev box?

[ls1_boy]

Im wondering what a good rev box is for my 2001 400ex. Its a 4ml stoker 400 with a cam and 89mm piston. I hear white bros is good but they dont make them any more. if anyone can help thank you

[DragonGunner]

http://www.atvriders.com/vbb/showthread.php?511606-CDI-REV-Box

[buck440]

Lol

[Blodg]

Not needed, stroker's don't need to rev to make power. You won't notice a difference.

[SpasticR450]

big gun makes them. Big guns add rpm and advance the timing adding 1-2 hp if I remember right.

[Wheelie]

Add timing via flywheel key for that stroker. You'll get better gains than you would with a rev box.

[ATVdork]

big gun makes them. Big guns add rpm and advance the timing adding 1-2 hp if I remember right.

I've seen the big guns rev box as I was browsing for parts I can use for ATV (http://4wheelonline.com/atv/) upgrades. any feedback about it?

[WwsivicwW]

most aftermarket "rev boxes" are xr250r boxes relabeled.