I did have a cougar which I believe had the same 550. I did have trouble with the oil injector that would stick open and needed a few fixes. I also had an Indy 500 from the same years and felt that was years ahead of the Artic cat. The cat was significantly faster, but the width of the hood/front end, poor rear suspension, handling, and design were not comparable. Still have the 500 and dumped the cat awhile ago.