This machine is very very impressive! I am amazed at what it does both on jumps and down straight aways.

One thing that has bothered me since I bought it though is the single piece rear sub-frame and grab bar... what happens when I bend it on a wheelie or crash or something?!?! I have to replace the whole rear end? That isn't cool, considering I already owe the bank my life!

ohwell, this is the funnest thing I have ever owned and wouldn't trade it in for anything! Very very impressive!

 

Well, if it happens to get bent too badly to straighten, I believe there are kits to hack it up and put on a bolt on style. I don't believe a new rear subframe is to horribly expensive either..

Have you checked the throttle adjustment on your 400EX? If not do so.... e-mail me if you need more info...