The VFR750R was the 30th production Honda motorcycle model with an engine displacement between 650 cc and 899 cc and became the RC-30. So maybe the RC-51 is the 51st model over 900cc or over 650 cc. With rumors of an RC-60 there sure looks to be some meaning to the numbers.
'04 Nicky Hayden
Flapper/PAIR Mod-Ladybird Full Ti Moto-GP -w- Long Cans-Proton Flushmount LEDs
HotBodies Undertail-Tyga CF Hugger-HEL Lines
Custom plate mount w integrated LED brake light
15/41 gearing-PCIII USB-Speedohealer-Carbone Lorraine Pads
Spencer Seat mod-Ceramic dual coat headers
It is a wise man who knows where courage ends ...
and stupidity begins.