WELL MY BIKE IS MAKING A WEIRD TAPPING SOUND AND I JUST HAD GOTTN MY MOTOR REBUILT.... THE BOTTOM END IS TOTALLY REBUILT AND THE TOP END GOT NEW VALVES , VALVE STEMS AND TIMN CHAIN TEN AND ONE MORE THING I CANT REMEMBER.... BUT ANY WAYS ITF A TRE IS BAD WILL IT CAUSE THE MOTOR TO TAP:here: