HAS ANYONE EXPERIENCED A BREAKAGE OF THE CRANKSHAFT T-KEY. I DID AND WAS WONDERING IF REPLACEMENT OF THE KEY WAS SAFE, OR IF I SHOULD REPLACE THE FLYWHEELS.ANY ADVICE WOULD BE APPRECIATED. THE BIKE JUST STOPPED RUNNING AND WHEN I TRIED TO RESTART THE EXHAUST WAS SUCKING AIR AND CARB WAS BLOWING. VALVE TIMING WAS OPPOSITE NORMAL.