My brother says it is a ticking, but to me it sounds like it is a knocking and not normal. It is definetly coming from the top end though. Could it be the valves? My brother thinks it is the magneto? I already took it to the dealer and they told me that they would have to tear it down to figure it out, said I am looking at $400! Help!
Take a long screwdriver, start the motor, put one end on you ear and the other end on the engine.... keep moving it around until it's the loudest... tell us where that is and you will most likely have the answer. It's most likely "ticking" and is normal on that motor with a little wear. How many miles are on the bike?