[fredcole]

I just got a 01 400ex it has e series white bros exhaust and has been jettedand has aftermarket rev box. What other mods do you recomend. I was thinking of nerf bars.

 

[HuntertheBeagle]

here is the link to a racers site and what all they did to their 400ex maybe it will give you some ideas. Our 400EX Modifications and Secrets

As for my suggestion i would say a good skid plate for underneath it I don't know how many times my DG skid plate saved my sprocket and chain from rocks especially considering how low sport quads sit.