a 400ex can't go 75 cuz a 250r can beat it and i am not sure how fast they go but i think they are around 75 ish.

 

id be surprised if a 400ex could touch 70. My friend that has a 400ex with a pipe and jets drove my 97 banshee yesterderday and he said it would smoke his 400ex. And all that is done to mine is pipes and jets. same with his. and a stock banshee hits around 72 stock. so i dont think a 400 could touch 70

 

I think Dirt Wheels said the 400EX would go 68. I could be wrong.

 

Mine has been clocked at just over 75 MPH on the salt flats in Utah. The banshees werestill beating me. I was also running a 16 tooth front sprocket.

99 426ex , Web Cam, FCR carb, CT revlimiter, DMC exhaust, XCT's ,K&N, One kit, Renthal 400EX bend bars
http://www.trxoutlawz.com/