2017 Honda CRF450RX, When it comes to motocross, our new 2017 CRF450R is huge news this year. But in the enduro, hare scrambles, and GNCC world, there’s even bigger news: Introducing the new 2017 Honda CRF450RX, the ultimate weapon for serious off-road competitors. At its core, we’ve taken our new CRF450R and optimized it for off-road racing. And not with just some new tires or graphics. We’ve done it the Honda way—the right way. And the results are, well, electrifying.ENGINEEngine Type449cc liquid-cooled single-cylinder four-strokeBore And Stroke96mm x 62.1mmCompression Ratio13.5:1Valve TrainUnicam® four-valve; 38mm intake, titanium; 31mm exhaust, SteelInductionProgrammed Fuel Injection (PGM-FI), 46mm downdraft throttle bodyIgnitionFull transistorized with electronic advance DRIVE TRAINTransmissionClose-ratio five-speedFinal Drive#520 Chain; 13T/50T CHASSIS / SUSPENSION / BRAKESFront Suspension49mm inverted Showa fork with rebound and compression damping adjustability; 12.0 inches of travelRear SuspensionPro-Link® Showa single shock with adjustable spring preload, rebound and compression damping adjustability; 12.28 inches of travelFront BrakeSingle 260mm disc with twin-piston caliperRear BrakeSingle 240mm discFront TireDunlop Geomax AT81 90/90-21Rear TireDunlop Geomax AT81 120/90-18 DIMENSIONSWheelbase58.1 inchesRake27° 22' (Caster Angle)Trail116mm (4.6 inches)Seat Height37.8 inchesGround Clearance12.9 inchesFuel Capacity2.2 gallonsCurb Weight261 lbs (Includes all standard equipment, required fluids and full tank of fuel ready to ride.) OTHERAvailable ColorsRedModel IDCRF450RX