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Description
CRF450RX
Here’s a secret the best off-road riders know and everyone learns eventually. While motocross bikes are light and fast, they’re built for the track. When you’re riding off-road, you need a specialized machine. . . .a machine like our CRF450RX. You’ll get the power, agility and precise handling of a factory motocrosser with the ruggedness and specialized suspension you need to conquer wide open riding.
For 2025 the RX gets all the changes we’ve given our CRF450R (new tank shrouds, new frame, new shock linkage, new front brake) and combines that with a close-ratio five-speed transmission, 18-inch rear wheel, Honda Selectable Torque Control and more. All in all, it’s as unbeatable off-road as our CRF450R is on a Supercross or Motocross track. And that’s saying something.
Redesigned Aluminium Twin-Spar Frame – We’ve carefully tuned the frame’s rigidity balance to factory rider spec, to boost corner speed over rough, torn up track conditions and improve high-speed stability.
450cc Unicam® Engine - Honda's Unicam® cylinder heads combine single- and double-overhead-cam designs to create a compact engine with a narrow valve angle. This allows for a higher compression ratio and lower center of gravity.
New Tripleclamps, Axle, and Steering Stem - The 2025 model features new triple clamps, a revised fork, and a new front axle and steering stem. These components work together to improve rigidity, responsiveness, and turning performance.
Redesigned SHOWA™ Rear Shock & Pro-Link – Rebuilt to match the new chassis the rear shock is tuned for uniform reaction anywhere in its stroke. It operates through an 11% more rigid Pro-Link structure tuned for smoother bump control.
New Radiator Shrouds - Using Computational Fluid Dynamics, we redesigned the radiator shrouds to increase cooling. This improves power consistency and endurance during a race, especially when the engine is pushed hard.
260mm Front Brake - The large front brake disc measures a whopping 260mm. It offers great brake feel and a pattern that reduces weight. Front and rear brake-disc guards are also part of the package. This year, a new caliper reduces the lever fade and provides a better brake feel.
Factory Handguards - Fully integrated handguards attach right to the control-lever pivots, are color-matched to your new bike, and are even vented.
Showa® Spring Fork - The 49mm Showa® fork is specially tuned for off-road racing and features a conventional spring design that helps increase front-suspension precision, handling, and feel. For 2025, new springs, seals, and valves improve the consistency of the stroke feel throughout the entire range of travel.
Swingarm - The swingarm uses a special fabrication technique that lets us fine-tune the flex to work with the chassis and give you better rear traction and cornering precision.
Airbox and Filter - The air filter and airbox shape improve torque delivery. The filter can be accessed through the left number plate, and the intake boot's filter interface has no rubber gasket, making it easier and less messy to clean and service.
Engine Type | Liquid Cooled unicam 4-stroke |
Displacement (CC) | 449cc |
Cylinders | 1 |
Valves | 4 |
Bore and Stroke | 96mm x 62.1mm |
Compression Ratio | 13.5:1 |
Ignition | Full transistorized with electronic advance |
Fuel System | Programmed Fuel Injection (PGM-FI) |
Starter | Electric |
Gearbox | Close-ratio five-speed |
Final Drive | Chain |
Transmission | Five-speed Constant Mesh |
Clutch | Wet type multi-plate |
Suspension Front | 49mm fully adjustable leading-axle inverted telescopic Showa coil-spring fork |
Front Wheel Travel (mm) | 309 |
Suspension Rear | Pro-Link system; fully adjustable Showa single shock |
Rear Wheel Travel (mm) | 313 |
Brakes Front | Single 260mm disc with twin-piston caliper |
Brakes Rear | Single 240mm disc |
Tyres Front | Dunlop Geomax AT81 90/90-21 |
Tyres Rear | Dunlop Geomax AT81 120/90-18 |
Rake Caster Angle | 27.1° |
Wheelbase | 1,478mm |
Seat Height | 958mm |
GroundClearance | 332mm |
Trail | 116mm |
Kerb Weight | 114kg |
Fuel Capacity | 7.95 litres |
Dimensions | 2,175mm(L) x 839mm(W) x 1,280mm(H) |
Frame | Aluminium twin tube |