RS just needs a de-restricted CDI to get the best out of. Take the NSR to the drag strip and a 14.8 will be your target.
Aprilia is aproky for a 125 (130kgs) the NSR has woeful running gear.

http://www.youtube.com/watch?v=SBomHoWaJwc

http://www.youtube.com/watch?v=TtPGu547Unw&feature=mfu_channel&list=UL

http://www.youtube.com/watch?v=unYl_g1BSRQ&feature=BFa&list=UL3rhfD6rfpt0&lf=mfu_channel