My friend just got into riding, and is addicted . Well we at a local track and he bike all of a sudden developed a loud ticking noise. It sounds likes its coming from the bottom end. Didn't lose power, pulls fine, easy to start. So I thought maybe its a broken clutch fiber, not they are all fine. The bike is less than three months old and has about 5 rides of a True Beginning rider. So its never been ridden hard. Where should we start?