When I rev the motor on the higher half of the engine rev it sound like something is rubbing or loose, As per previous thread i thought it may be the Cam chain slapping but now I am not so sure maybe something in the clutch? The motor runs fine but just makes an add high pitched grinding sound almost. I kinda sure its coming from right side of the engine. Please HELP! any ideas? its like to fix before whatever is breaks and potentially causes damage