Picked up a '92 Exciter II over the summer. Cleaned up the carbs, put in fresh petrol and fired her up. Problem is she goes up to 3000rpm and then sits there stuttering like the timing is retarding or something. While this is happening a red light on the dash, labeled TORS is blinking. I don't know much about Yamis so if anyone could give advice I'd really be greatful. Thanks.