400ex aftermarket rev box question

[nowukno]

i have a 2005 400ex with a pro circuit t4 full system exhaust , stage 2 dyno jet kit and k&n filter with outerwear , i was considering buying a aftermarket rev box for my quad , i have heard alot of good and bad about them , i was wondering what all of you thought about the rev box .....please help!!!!!

[chigger]

Most give you about 1000 more rpms. Its a big plus for mx, sand, and doughnuts. Its harder on engine parts while your up there, but exs are pretty well bullet proof to start with.

[JDiablo]

just stay away from the big gun and espcially the white brothers one,i have heard sparks and magnum are very very good

[JOEX]

Some of them have starting issues if the battery isn't fully charged:ermm:

[shawn1103]

make sure the manufacturer you go with makes one for the 05. i have an 05 as well and i tried ordering the dynatech ignition and they dont make one for the 05 yet. none of them do. they are in the works. so, just a little fyi.

[EX4me]

GT Thunder is the one to buy. No cold starting problems at all like the White Bros.

[shawn1103]

how do you order from this gt thunder?

[397ccEX]

Dont kknock on the Big GUN iM IMPRESSEED I RECOMEND IT

[charles]

have just put my rev box on my 05.had turn it sideways to fit in the rubber strap thing better throttle revs.:blah:

[400exrider707]

Originally posted by EX4me
GT Thunder is the one to buy. No cold starting problems at all like the White Bros.

[nowukno]

did the rev box effect your 05's starting at all , and what brand is it?

[Rico]

GT THunder rev box fo sho.


WB CDI sucks big arse

[yub350]

Ive got a White Bros rev box and have had no trouble with one. I don't really know much about the different brands of rev boxes, but mine starts everytime. Just my 2 cents.

[Rico]

Originally posted by yub350
Ive got a White Bros rev box and have had no trouble with one. I don't really know much about the different brands of rev boxes, but mine starts everytime. Just my 2 cents.

Give it time and it'll happen. It's not a matter of if, but when.. :D

[Blysster]

Originally posted by Rico
Give it time and it'll happen. It's not a matter of if, but when.. :D

I have a WB rev box.. in a box somewhere.

Like Rico said, give it time. Mine is almost impossible to start with it. They are not worth the money if you ask me. I would invest in other things first.

[whiteflash]

i have a whitebrothers and have no problems with it so far, i got it for only 49.99.

[EPDP99]

i run big gun and havent had any starting problems whatsoever. been running it for 2 years now. Im still using stock battery also. I just charged it before then install and havent had any problems.:D Id buy it again

[journeyman]

anyone know where to buy these gt thunder parts from??

[troutman561]

my friend has a white bros rev box on his 04 and we have been riding in 30 and 40 degree weather all winter, and no starting problems hot, cold, or whenever, i have one on the way myself for my 05

[Zahachee]

My Big un is good
it advances the timing so u rev faster and higher, it definitely gave me at least 2 or 3 horse
supposed to be the best bang for yer buck