hey guys I just got a 400ex, it is a 2000 red, white bros e series tip, handle bars, knn, and an aluminum back six pack rack. Are there any good perfomance mods I can do to it?

 

Get it ported or bore it out. you can make it a 440ex if you get the right kit.

 

anything else besids a 440 kit?

 

check the 416 before you go 440. we just had a stroke on ours and it helped a little[img]i/expressions/face-icon-small-smile.gif[/img]

 

The 400ex has alot of mods here are a few good ones fmf power core4 buy header pipe also bigger improvment get hydrolic clutch v-pro bumper for when you hit some thing DG aqlloy sereis nerf bars
new product nos for atv's. hope I could help you.

 

get a full exchust system and get it rejetted and take off the air box lid it will run stronger

 

Get shocks. Maybe a-arms, axle.
You are by far the best off to buy suspension long before you buy any motor upgrades.

 

thanks guys, I think I am either gonna get works shocks or fmf header

 

I've heard a high compression 416 piston and a cam is a great bang for your buck.