My nephew has the same sled that I have. the 04 adrenaline 600 SDI. I haven't had any problems, but he has. He had to have the computer reprogramed twice now! He'd have it running fine for a while, shut it down, and then it wouldn't start. after a while he got it started but seem to be running on only one cylinder. I don't know if his problem is a common one or not but the dealer knew just what to do. Reprogram the computer.