Ok i have an ex500 and i have a weird noise coming from the engine. it sound slike a slapping type noise above the gear shifter in the motor. it inst there when i am out of gear and the bike is idling. when i put the bike in gear and start to move it starts, and when you accelerate there is a noticeable jerky feel until about 7000 rmp then the bike takes off and you dont feel it anymore. it is mainly there when you are just cruising and there is kind of a clank noise from the motor when you are letting the bike slow down in the gears with no break. the sound to the best of my ability sounds a bit like this, ta tap ta tap ta tap, sounds almost like a chain in the motor is slapping or something, the bike has no power loss at all, runs fine when your not in gear but just does all this when you are in gear and moving. any ideas?