My 2003 CR250 does not have steady roll on throttle. It takes a while to "catch" and start to pull. When you give it throttle in first it basically Bogs, whomp whomp vroom. Its not steady at all. I had the carbs cleaned and a new plug which helped a considerable amount but it is still doing it. The tech who cleaned my carb said he pulled off the exhaust and said it looks like the piston and rings are worn, but he wasnt positive and was going to charge me an arm and leg to take it apart to give me an estimate. Could this be the problem? Any suggestions? I use high test octane and run 32:1 with HP2. Please help, thanks! :whoa: