help 400ex

[bulloxerfan]

I have a 400ex 2002 has a couple extras not a lot like I have seen on here.Every where I see people are talking about how to get more out of them I will list what I have done see if anybody has any ideas how to get more out of my lower gears I can stand it up in first and second but i have to pop the clutch to get it up in third any way i can get more low end thanks.

[brodzowski]

Holy cow, by the time you're in third, I'd think you were going fast enough to not WANT the tires in the air, but that's just me I guess. From the research I've done, that stage 2 cam you have in there is built for mid to top end. If you were looking to really crank up the lower end you might drop it down to a stage 1 built for low end. If it's running good and jetted well, I'd say leave her alone, but you didn't ask the question to get that answer..:) You've already dropped a tooth on the front sprocket and they don't reccomend a sparks key on a modified engine due to heat so....I'm not sure you have any other options except the cam. Anyone else?

[bulloxerfan]

Yea when I went down a tooth I lost about 8mph on topend dont want to lose anymore that way thanks not a real problem but we allways want more then we have.

[bulloxerfan]

Thought I would post a pic anybody else got pic of there 400?

[honda400ex2003]

k and n or equivalent and a 450 carb would be next for more power i guess. steve

[bulloxerfan]

does the 450 carb bolt on to the 400 or is there mods that are needed?

[honda400ex2003]

there are a few mods if you go to the 450 carb sticky at the top they do a good job of how to do it. I ahve not done one to know. I know it is made easier by the zrpilot adaptor he made. I would talk to him too since you dont have to move your airbox with the adaptor. steve