Are rev box's a good thing to get more performance from a honda 400ex

 

IMO no. The 400ex already revs plenty high. Higher than I would ever rev mine. I never hit the rev limiter in the 400ex drag racing and the only time I ever did doing hill shoots was once I topped over a hill there was a ditch on the other side that I didn't quite miss as planned. I buried the front wheels and went to fly over the handle bars pinning my knee against the throttle. I had the mind set to be holding the clutch at the time but, the rpm's pegged like crazy. No way would I feel safe having my quad rev higher than that in any circumstances.

 

My neighbor has a couple 400ex's and he has Rev boxes on both of them. He swears by them. With a Rev box it's not just an RPM increase, it's also a timing advance which adds a little HP, which the EX could always use more of. [img]i/expressions/face-icon-small-happy.gif[/img]

 

<div class="FTQUOTE"><begin quote>Originally posted by: SilverBomb

.....it's not just an RPM increase, it's also a timing advance which adds a little HP, which the EX could always use more of.</end quote></div>

True, albeit ever so slight hp increase according to dyno's but, ever lil' bit helps. So if you already have pipe/filter/jet. It may add a bit of performance. Personally before rev box I'd then get rims and tires, they reduce weight and are stronger. Then some nerfs, good grab bar, maybe handle bars... Just a personal preference I guess. To me rev box would be one the last things to spend my cash on.