ive just bought a 51 plate 640 supermoto,its black and red.i have had loads of fun on on it so far but i cant understand why not only my bike but every 640 S,M have endruo looking tyres on.can anyone help me here,should i change my tyres or ?.its only that a have seen a dzr 400 sm with proper road tryres on.am i missing something here.thanks oggie from oldham