want my 400 to go faster

[hondaman4life]

i want my 2004 400ex to go faster. I was reading some other post and it said to change the gearing and the cdi. Whats all of that about and where could i get that. I have a full hmf right now and 11:1 piston, stage 2 hotcam, and big gun rev box. plz tell me anything to make it go faster. Also i read that all of those mods dont make it faster, its just suppose to help it get to top speed quicker. Any info will be helpful.

[98red]

Talk to Colby at C&d Racing, he can make it go faster :D

[honda92]

go with the sparks 465 kit, i rode one for the first time the other day and it goes like a bat out of hell. reliable as can be too

[blakefoote]

i would try sprockets. It also depends on your riding style and area you ride in. If you ride motocross or tracks I would get smaller tires. if you like to ride in trails or roads i would get bigger tires. I just got tires and they have help on speed "alot".:eek2:

all the tires do is change the gearing. changing the rear sprocket to a smaller one is the same thing as putting bigger tires on the back.

[Joe400ex]

if a 440 is not realiable how is a 465 and how much does it cost. plus dont u need to re sleeve it

[honda92]

the 465 goes for around $2000 i think. everything is done right for reliability purposes. 2 people around here have them, 1 has had it for 4 years, races and trail rides in the summer and rides snowmobile trails in the winter. its all in the kit, sure you can go cheap and get a 440 kit and do nothing else and have problems or you can get a quality kit that has a stronger connecting rod and what not all for reliability. i've seen the 465 beat banshees without a problem. but if i were you and still had a quad with stock suspension i would recomend upgrading first. you will be much faster with a good working suspension. all the power in the world isnt going to help you if your suspension sucks.

[400exredrider]

or do a 416..:D

[2004exrider]

try 14/39 gearing, youll lose a little top end but gain lots of bottom end.

[Speedy81304]

Gearing for more speed also taller tires. engine mods help accel faster and keep your speed. I'm running on my 450R stock gearing and some minor engine mods, mostly i have done suspension tuning to get my speeds faster on the trials.

my buddys 400EX needs alot of work to just keep up.