I guess I should have been more specific, haha. Its for a service honda CR500 I picked up late last summer. Im going through the whole bike this winter and it's due for a top end. The cylinder doesnt look too bad, but is definetly worn in places and i'd like to get it cleaned up. Havent had a two stoke since my 01' cr250 and the guy I had work on it is no longer in business. None of the 450's I've had since have needed cylinder work.