Looking to pick up a new bike for my son. He's got the crf 50 and has put countless hours on it over the past 3 years with no issues. So the problem now is he's turning 8 and wants to go faster. He's mentioned learning how to track ride (race) with some enthusiasm, but for the most part he just likes to ride around with friends. My question is what would be the best bike for him in the 65cc two stroke class?