my friend wants an aftermarket rev box for his kfx400 but what do you all think he should get? he was thinking about big gun but i said procom or dynatek might be better, i know they have procom 3 way adjustable rev boxs on ebay are they good? thanks

 

I had a big gun and didnt like it, went with the dynatech and its worked great, took it to a shop and had it dyno tuned for the best setting on the cdi. I heard procom was a good cdi too

 

where u buy your dyna from? how much were they?i couldnt find the dynatek all i could find is the procom 3 way adjustable and the big gun...thanks maybe ill go with procom if dyna isnt too much

 

I have the Procom 3 way adjustable & it works great. Some people will give Procom a bad rap. This may have been true when they first started making them, but I think the newer ones are just fine.

There is a very noticable difference in the settings. I have never ran it in any of the over-rev settings. Without aftermarket cams to the pull the higher RPMs, it's pointless.

 

alright so you feel a performance gain? like how much and where at? and u run on stock settings? you dont let it rev any higher? the guy who might buy will have a yoshi slip-on,K&N clamp filter,no lid and a jet kit, how much was yours? i see some on ebay for like 145 i think http://cgi.ebay.com/ebaymotors...trksid=p3756.m14.l1318 is this what u got?

 

try here parts

 

we went for big gun i got a deal on it since i worked at a dealer for only $115 plus tax and it helps, revs alot higher now...btw where u get the 39mm FCR carbs at?

 

this is where my 41mm came from carbs

 

ok not sure if the 41mm wud be a good idea for us but about how much was it? they dont list prices and also does that aluminum airbox help with power at all? i heard they help with low end power, thanks

 

the airbox I have uses a honda 250R air filter its twice the size of the Z400.the more air you get the better. when I got my carb it cost around $550 but its a FCR 41mm flatslide racing carb.now its around $650 for the 39mm. a lot of people use the carb from the yfz 450 if im thinking correct