Well redeyes, heres my buddys 400ex, it has just about everything you can do done to it, and it still doesnt even come close to comparing with my 450r, even when it was stock! For motor work he has a UM airbox with no lid, velocity intake kit, FCR carb, High Comp piston, stage 2 hotcam, port&polish. He still has nothing on the 450. But bigred, whats wrong with 2wd machines on the ice? Hell, I think going 80mph on the hard stuff is fun when the fishing gets slow, or ripping wheelies that you can ride forever, hell I had one going for the whole length of friends lake sunday ( I would say about 2 miles) I love 2wds!!