Q. CBR 1000RR what does the RR mean compare to just one R.

I am speaking for the CBR250 genre.Whilst both bikes appear to be very similar at first glance, they are almost entirely different.R is road specs, RR is Road & Racing specsThe frames are differentR - a simple 5 section box twin spar alloy frame similar to most sport bikes RR - wider and more stylish twin spar frame that allows easier access to items such as the radiator cap. Longer head stock.The BrakesR - a single disk with a single two piston caliperRR - duel smaller disks (whose got the measurements?) each with a two piston caliper.Rear SuspensionR - straight box style symetrical swing arm, with a vertical shockRR - gull arm swing arm, asymetrical, with a more horizontal shock (about 30 degrees)Fuel systemR - Pump fed, adjustable float heights, smaller jets.RR - Gravity fed, fixed floats, larger jets.EngineThere are few differences the engine, externally they are the same. Rev limiter may be more higher in the RRSeatingR - More padded seat, more upright positionRR - Firmer seat, more sporty positionPhysical appearanceR - Clip ons mounted on top of triple clamp, rear fairing meets under tank, (fake) ram air ports are horizontal next to headlights, single brake, lower rear end, exhaust mounted to the same bracket as pillion pegs, contoured spar frame, unsculpted top of tank and no sculpting on the rear fairing, the tail light section is considered better looking and less prone to cracking, the lights sit into the body work more.RR - Clipons mounted under triple clamp, rear fairing sits behind tank, (fake) ram air is verticall under the head lights, twin front brakes, higher rear end, "bent" swing arm on the exhaust side, pillion pegs and exhaust bracket are seperate, stylized frame, sculpting on top front of fuel tank.

RR is for racing and road, R means road