The higher compression ration and the different heads and cams. Im not saying that it will put out more power than a 636 but every mod ands more power to a RR than it does on the 6r I.E. Kit ECU rr-10-12hpdoes the top speed differ on the rr and the 636 which is higher? and how does the rr make more power in the long run h20?
You would think so but wider is better, i guess:OWouldn't a more track oriented bike have a shorter wheelbase? :O