[Hickman]

ok, so, i have no idea what the difference is between a CBR 600RR and a CBR F4I ? there both run Fuel Injection (rr's used to be carbed from what i understand) woud it be all tuning? or would the heads ect be different? sorry not big into bikes... yet :P

[xPhuong]

RR has a different power band. It climbs rapidly high up while the F4i has a smoother powerband easier for beginners if you roll on the throttle you won't shit your pants.

[Hickman]

haha well put! and ty, thats awasome to know :)

[stevo911_]

The RR's were always fuel injected (they took the injection system directly from MotoGP) it also has better rear suspension. The RR means Race Replica, it has a more aggressive (less comfortable) seating position (think racebike ;) )

the F4i is less aggressive/more comfortable with a broader powerband

Either one is certainly fast enough to make you shit your pants if you're hard on the throttle (110 HP vs 118 and they both weigh ~370lbs). Theres not much benefit to having the RR over the F4i aside from cool factor unless your last name is Rossi