The complete redesign results in an engine that delivers 10.3 percent more peak horsepower, 3.7 percent more peak torque, and is 17mm narrower and nearly 6 pounds lighter than the 2026 model.

New cam profiles and a new bore and stroke help deliver increased midrange and high-rpm power.

The titanium intake valves have increased in diameter from 38mm to 40mm, and the exhaust valves from 31mm to 32mm. The valve angle in the head also changed to optimize intake efficiency. The intake port is shorter, too, all of which contributes to the boost in power.

The new, bigger bore and shorter stroke (97.0mm x 60.8mm), larger piston, and new piston-crown profile all result in a higher 13.8:1 compression ratio for better overall combustion efficiency and more power.

Now, with roller main bearings at both ends, the crankshaft profile has been radically reshaped compared to the traditional anchor design. This works in conjunction with the new clutch to reduce frictional losses and more efficiently convert combustion into rotational energy while fine-tuning the engine’s overall flywheel effect. The result is smooth, predictable power that’s easy to modulate and that helps keep you hooked up.

The new airbox design has no separate lid, allowing you to access the air cleaner just by removing the sidecover.

The engine features an oval-shaped, centrally located exhaust port, which, along with the single-muffler exhaust, boosts power from 5000 rpm and improves exhaust efficiency. 

The system sprays fuel twice per intake cycle for better atomization and increased midrange power and overrev performance. You'll feel it the first time you twist the throttle.

The single-pipe header routes close to the center of the bike, and its light overall construction helps improve weight distribution. Compared to the previous generation, it also produces more controllable power in the low- and mid-rpm range. 

The 2027 frame may look the same, but it’s really all-new, with slightly more steering rake and a longer wheelbase. The major frame components have been fine-tuned for rigidity and weight loss. Meanwhile, the footpegs moved back 5mm, making it easier to shift your weight over the rear wheel to help it hook up. 

Specially tuned for off-road riding, the new 49mm Showa® fork features Kashima coating to the internal sliding components, enhancing stroke feel and improving smoothness. A DBS (Dynamic Blow System) main-piston valve increases compression damping in the extremely low- to low-speed range, improving stroke consistency.  

A lighter shock body is surrounded by a new red spring. The shock itself is more responsive, enhancing damping feel in the low-speed compression range and providing a more consistent feel throughout the suspension stroke.  

Experience faster cornering with the lightweight, superior chassis design, which maintains finely tuned lateral rigidity. 

Check out the new swingarm. Meticulously hand-polished, the smooth step-free design and flawless welds elevate the bike’s appearance. The new throat-welded construction also helps reduce weight by nearly a pound. 

Dunlop’s Geomax AT81 tires are specifically designed for Enduro use. They are spec'd at 21 inches for the front and 18 inches for the rear.

The battery box is positioned low for an improved center of gravity. It’s also easy to service and watertight, so there’s less to worry about when racing in wet conditions.

Designed for enduro use, the 18-inch rear wheel and tire combo provides better bump absorption and a broader contact patch to smooth out the roots, ruts, and rocks that come with off-road riding.

The large front brake disc measures a whopping 260mm. It offers great brake feel and a pattern that reduces weight, while the caliper is designed to reduce lever fade. A front brake-disc guard is also part of the package.

The Renthal aluminum Fatbar features a bend tuned for off-road riding, making it the new standard in excellence. You will love it!

This bike has a hydraulically actuated Nissin clutch, the same design as our Grand Prix MX machines, with a 10 percent lighter pull than a cable equivalent. You won't need to make clutch-cable adjustments, even during long events.

For 2027, we’ve changed both the air filter’s density and its shape to reduce airflow resistance by approximately 10 percent. 

Changing terrain requires changing power characteristics. No worries: This bike features our Honda Selectable Torque Control (HSTC). Depending on the available traction, you can choose from one of three settings to dial your bike in perfectly.

Every gram counts, so we equipped the bike with a titanium fuel tank. It is light and strong, and thinner than our previous plastic unit, freeing up more space and helping to centralize the fuel's mass.

Totally redesigned using HRC works feedback and developed on the MXGP circuit, the clutch-disc diameter is smaller this year, and the primary drive gear is redesigned for lightness. A new back-torque-limiting system uses rubber dampers instead of springs, which also provides a slipper-clutch function—the world’s first of its kind? Compared to cam-type slipper clutches, it’s lighter and ideally suited to off-road use. 

Honda is famous for its transmission quality and shift feel, and the 2027 CRF450RX takes that to the next level. New split resin cage needle bearings work in conjunction with shorter transmission shafts to save weight, too. 

A factory skid plate is lightweight and offers the engine and lower-frame protection that an off-road racer demands.

Smoothing out the bodywork transition between the front of the seat and the radiator shrouds makes it easier to move effortlessly on the bike. The seat itself features larger radius corners up front and smaller radius corners on the rear to improve comfort, hold, and handling. 

There’s no way you can miss the new Honda graphics. Straight off our factory MXGP bikes, everyone will immediately know you’re on a 2027 model. The blue rear fender and side number plates are a nice nod to Honda’s historically dominant off-road machines and proudly reflect the tri-color HRC Racing look.

The DID DirtStar rims are lightweight and strong, while the black color looks good and is easy to clean.

Our engineers used Computational Fluid Dynamics to fine-tune the radiator shrouds for increased cooling efficiency. The one-piece design ensures consistent power output and prevents overheating.

Real enduro bikes need a sidestand, and we’ve given this bike a great one. Because there’s no muffler on the left side, we have tucked the sidestand closer when it’s folded for better clearance.

Fully integrated handguards attach right to the control lever pivots, are color-matched to the bike, and are even vented.

Changing the air filter, replacing the rear wheel, and servicing the rear shock have become simpler than ever. To access the airbox, simply remove the left-side number plate. Additionally, the redesigned side collars on the rear wheel make removal and installation much easier.

To keep the bike light, our engineers use an electric starter with a lithium-ion battery.

Customize your engine's power delivery on the fly with the convenient handlebar-mounted button, allowing you to effortlessly switch between Standard, Smooth, and Aggressive modes to suit varying track conditions or rider preference.

This special ECU program allows you to select a start mode, then simply hold the throttle open and release the clutch, letting the bike do the rest. Trust us when we say it gives you a significant advantage into the first turn.