My bike started making this weird clicking noise when I squeeze the clutch. After several rides I notice that the clicking does not start until the bike is warm and it does not do it all the time. The clicks speed goes with the speed of the bike. Moving faster makes clicking faster. I don't notice the noise unless the clutch is in or moving in nuetral. I just put the bike in nuetral while the engine was cold and moved it around no noise or clicks. Any guesses where to start?