Well i got a 01 400ex i just put in the 87mm 416cc piston, wiseco 11:1 compression and shaved my head 7 thousanths ive got a scorpion slip on exhaust and supposedly an oversized carb(the guy who sold it to me 3 years ago told me this but i don't know how big factory is to check). Its runnin great, plenty of power. I am about to buy a stage 2 cam which should really open it up.

I think im goin to buy a stage 2 rev box off ebay and a 14 tooth front sprocket. this way i will have more torque but i shouldnt lose any top speed due to the rev box. Any suggestions or comments would be appreciated about my build.

Any advice?