I recently got a 2000 People 50 2 cycle. It looks good and seems to run good, but 25-30 MPH is all it will do. I weigh in at 130lb. I pulled the cover and found the bushing on the variable pulley has been replaced with a smooth one. I removed the exhaust to remove the restricter washer, but there's not one in it. From what I've read, the way it is now, I ought to be getting 40mph. I think the CDI is stock, and I haven't taken the carb off to check jet sizes yet. I did measure the rollers in the variable pulley and found them to be bigger than stock. With this known info, what can I check and do to make it faster?