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Enduro riders are unique—they need the performance every winner wants, but in a unique package. We hear you—and that’s why we build the Honda CRF450RX, with all the power, handling and refinement of our dominant CRF450R MX’er, but fine-tuned for enduro use. With features like a bigger fuel tank, a sidestand, an 18-inch rear wheel, and special suspension settings. Plus all the updates we’ve given our CRF450R, like Honda Selectable Torque Control, a new battery box that relocates the battery by 28mm for a lower center of gravity, new rear brake pads that last longer and improve stopping power, and even new graphics.
Honda SELECTABLE TORQUE CONTROL (HSTC)
Notice that new button on the handlebar by the clutch perch? New for 2020, the CRF450RX gets our Honda Selectable Torque Control (HSTC). You can choose from one of three settings to perfectly dial your bike in depending on how much traction is available.
260mm FRONT BRAKE
The CRF450RX’s large front-brake disc measures a whopping 260mm. You get great brake feel and a pattern that cuts down on weight. Front and rear brake-disc guards are part of the package too.
ENGINE MODE SELECT BUTTON
This simple handlebar-mounted button lets you dial in engine power delivery character with a push of your thumb. Choose between Standard, Smooth and Aggressive, depending on track conditions.
HIGH-CAPACITY RESIN FUEL TANK
For longer enduro loops, the CRF450RX features a bigger fuel tank that holds a full 2.25 gallons.
HRC LAUNCH CONTROL
We’re talking about a special ECU program here: push the button to select the mode, hold the throttle open, release the clutch, and the CRF450RX will do the rest, launching you into the first turn with a big advantage. It turns your bike into a holeshot-seeking machine!
LIGHT OVERALL WEIGHT
On a racebike, less weight is always better. That’s why our engineers are such fanatics when it comes to trimming grams from the CRF450X. You’ll feel the benefits everywhere: in acceleration, in suspension action, and most of all at the end of the day.
NEW REAR BRAKE PADS
Brakes are for more than just stopping: they help you set up the bike in turns and jumps. This year we changed the pads on the 2020 CRF450RX so they’ll last longer and give you even more stopping power—a real win/win to help you win.
Kickstarting? Maybe if you’re riding in the vintage class, but not here. By ditching the kickstarter entirely, our engineers can make the CRF450RX lighter. Electric starters and lithium-ion batteries are so light now and so good that putting them on a bike like this is a win/win combination. And winning is what a CRF450RX is all about.
449cc UNICAM® ENGINE
Honda’s Unicam® cylinder heads combine the best of single- and double-overhead-cam designs. The configuration contributes to a compact engine that saves weight over a comparable dual-overhead-camshaft motor and also permits a narrow included valve angle. This flattens the combustion chamber to facilitate ignition flame propagation, allowing a high compression ratio. Since less space is taken up in the cylinder head, the camshaft sits lower in the head for a more compact engine and a lower center of gravity.
DOWNDRAFT FUEL INJECTION
The CRF450RX features a downdraft intake tract and FI body to help increase both power and fuel-metering precision. It’s part of the reason the CRF450RX offers such explosive power and massive torque, especially out of the starting line and in the critical first 100 feet of the race to the first turn.
TITANIUM INTAKE VALVES
Lightweight titanium intake valves cut down on reciprocating mass and permit the use of smaller valve springs, reducing overall engine height.
DOUBLE-SPRAY INJECTOR SETTINGS
The CRF450RX’s fuel-injection system sprays twice per intake cycle. That helps increase fuel atomization without adding the weight or complexity of a second injector. The better fuel atomization means more power in the midrange and on overrev—you’ll feel it the first time you race.
13:5:1 COMPRESSION RATIO
The CRF450RX features a refined squish area that helps boost compression to an impressive 13.5:1. That means improved combustion efficiency for more power.
CYLINDER HEAD LAYOUT
The CRF450RX uses our latest finger-follower rocker design. The Unicam cylinder head remains one of the most efficient in the off-road world, giving you the design and performance of a double-overhead-cam layout but the compactness of a single-overhead-cam design.
UPDATED "IN MOLD" GRAPHICS
With all the time you’ll be spending in victory circle, you need to look your best. The 2020 CRF450RX has you covered. Our redesigned “in mold” graphics look great, and stay looking good.
A factory skid plate is light and offers the engine and lower-frame protection that a racer demands.
DUNLOP GEOMAX TIRES
The CRF450RX’s Dunlop Geomax tires are specially designed for enduro use. The AT81 tires are spec’d at 90/90-21 for the front and 120/90-18 for the rear. You read that right: the CRF450RX rolls on an 18-inch rear wheel.
RELOCATED BATTERY/BATTERY BOX
For 2020, we designed a new battery box for the CRF450RX that moves the battery 28mm lower. That helps lower the overall center of gravity, which is always a benefit for responsive handling.
SHOWA® SPRING FORK
The 49mm Showa® fork is specially tuned just for the CRF450RX, and features a conventional spring design that helps increase the CRF450RX’s front-suspension precision, handling and feel.
NEXT-GENERATION ALUMINUM FRAME
The CRF450RX’s Next-Gen twin spar aluminum frame positions the rear shock’s mounting point lower, opening up the airbox area and contributing to a lower center of gravity for more holeshots. The frame geometry also helps improve traction, feeling and steering precision.
The CRF450RX’s 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.
TWIN-MUFFLER EXHAUST SYSTEM
The CRF450RX’s dual exhaust system is light, compact, and positioned close and low in the frame to take weight off the rear end and bring more mass to the bike’s center for improved handling. It also allows for more air flow, and that equals added horsepower.
The aluminum Renthal Fatbar features a bend that’s even better than the legendary Honda “CR” bar. It’s the new standard of excellence—you’re gonna love it!
FLAT SEAT/TANK JUNCTION
The CRF450RX features a flat seat/tank junction, including a titanium fuel tank. The superior ergonomics make it easier to move forward and back on the bike, increasing your control.
They may not help you go faster, but the black DID DirtStar rims sure look good.
Real enduro bikes need a sidestand, and we’ve given the CRF450RX a great one. Tucked up high and out of the way, this forged alloy piece is just another example of how the CRF450RX gets it right.