The complete redesign results in an engine with 10.3 percent more horsepower at peak, 3.7 percent more peak torque, and one that’s 17mm narrower and almost six pounds lighter than our 2026 model.

New cam profiles and a new bore and stroke help give the engine 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 (included angle remains the same), to optimize intake efficiency. The intake port is shorter too, all contributing 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 on both ends, the crankshaft profile has been radically reshaped from the traditional anchor/porkchop 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 engine features an oval-shaped centralized exhaust port, which, along with the single-muffler exhaust, boosts power from 5000 rpm up and increases exhaust efficiency. 

The system sprays fuel twice per intake cycle for better atomization and increased power in the midrange and on overrev. You'll feel it during your first race.

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

The CRF450R HRC WORKS EDITION’s exhaust is another premium item. It uses a new titanium header, mid-pipe and muffler made especially for us by Yoshimura. Super light and super trick—the exhaust tucks away for better ergonomics, too. 

The CRF450R HRC WORKS EDITION gets hand-polished cylinder ports with a red metallic cylinder head cover, Twin Air filter, gripper seat cover, DID DirtStar LT-X rims, Yoshimura exhaust system, Kashima-coated fork legs, revalved suspension, a DID DM2 gold chain, special ECU settings, and black triple clamps.

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.

A 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 CRF450R’s new swingarm. Meticulously hand polished, its 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.

Brakes do more than stop the bike. They help set up turns and jumps. Our brake pads last longer and provide more stopping power to help you win.

The pedal-type front brake disc measures 260mm, providing excellent brake feel and weight reduction. We’ve also included a guard to protect against roost and rocks.

Dunlop’s MX34 tires feature an intermediate design that works well in a wide variety of conditions, providing superior rider feedback and improved cornering grip.

Renthal’s aluminum Fatbar comes standard, featuring a bend superior to the Honda CR-bar, making it the new benchmark in excellence. You’ll love it!

Inspired by our Grand Prix MX machines, the hydraulically actuated clutch offers a 10% lighter clutch lever pull compared to a cable equivalent. It also eliminates the need for adjustments, delivering optimal performance for even the longest motos.

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

A six-percent larger radiator compared to the previous generation provides the cooling capacity needed to sustain the engine's high power output.

Hondas are famous for their transmission quality and shift feel, and the 2027 CRF450R takes that to the next level. New split resin cage needle bearings work in conjunction with shorter transmission shafts to save weight too.

A small part but still significant. Reducing the shift-drum lead grooves from three to two and shortening the drum shaft make it more compact and lighter too.

The smart ECU delivers tailored engine mapping for each gear, giving riders the edge with optimal power for every track, turn, jump, and rut.

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 and 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 motocross use.

Easily control your bike's traction with the left-side handlebar-mounted green button, activating our Honda Selectable Torque Control (HSTC) system. It offers three customizable settings to optimize your ride based on conditions or preference.

Every gram counts, so we gave the bike a titanium fuel tank. Light and strong, it’s also thinner than our previous plastic unit, freeing up more space and helping to centralize the fuel’s mass. You get more fuel capacity now too—a full 1.9 gallons.

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.

The CRF450R HRC WORKS EDITION gets an exclusive graphics package inspired by our HRC WORKS bikes, while the durable "in mold" graphics ensure long-lasting visual appeal even after intense track sessions and repeated cleaning.

There’s no way you can miss the new Honda graphics on our 2027 CRF450R. 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 dominant historic motocross bikes, too.

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

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

The new airbox design has no separate lid—you can access the air cleaner just by removing the left sidecover.

It may seem small, but every second counts when you’re servicing your bike between motos. Fewer mounting bolts mean enhanced serviceability at the track or in your garage.

Things like changing the air filter, the rear wheel, and servicing the rear shock are easier than ever now. For example, all you need to do is remove the left sidecover for total airbox access. With the rear wheel, redesigned side collars mean easier, installation of the wheel into the swingarm.

Customize your engine's power delivery on the fly with the convenient left-side handlebar-mounted blue button, allowing you to easily 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 turns it into a holeshot-seeking machine!