Electric Start

Kickstarting your bike is so 2016. 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.

Lighter Overall Weight

We shaved an additional 795 g (1.75 lb) from this year’s CRF450RX—a surprise considering how light this bike already is. Where did it come from? Mostly from eliminating the kickstart option, but weight is weight, and on a racebike less of it is almost always better.

260mm Front Brake

The CRF450RX’s large front-brake disc measures a whopping 260 mm. 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.

High-Capacity Resin Fuel Tank

For longer enduro loops, the CRF450RX features a bigger fuel tank that holds a full 8.5 litres.

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 course conditions.

449 cc 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.

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 30 meter (100 ft) of the race to the first turn.

New 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.

New Longer Head Pipes

Lengthening the CRF450RX’s headpipes help give you better throttle response and top-end pull.

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.

“In Mold” Graphics

With the all the time you’ll be spending in victory circle, you need to look your best. The 2019 CRF450RX has you covered. Our “in mold” graphics look great, and stay looking good longer.

New Programmable ECU

Want to fine-tune your CRF450RX’s power delivery to a specific riding style or course? It’s easier than ever with the 2019 CRF450RX’s programmable ECU.

Skid Plate

A factory skid plate is light and offers the engine and lower-frame protection that a racer demands.

13.5:1 Compression Ratio

The cylinder head of CRF450RX features a refined squish area that helps boost compression to an impressive 13.5:1. That means improved combustion efficiency for more power.