ENGINEERING

NINE-PLATE CLUTCH ASSEMBLY

Say good-bye to clutch fade the bike uses a nine-plate design to improve durability and hook-up. That means less slip at peak horsepower, better torque transmission through the clutch pack and greater durability. Plus, the clutch pull is lighter, and you get improved engagement feel.

BIG BORE SHORT STROKE

The CRF250R’s 79.0mm bore and short 50.9mm stroke let our engineers create a high-revving engine with plenty of room for large valves. The engine breathes and revs the two keys to making power in the motocross world.

DOHC ENGINE LAYOUT

The CRF250R uses a double-overhead-cam (DOHC) engine layout with a unique finger-follower rocker design. Together with the rest of the engine’s architecture (bore and stroke, intake tract, piston, and more), you get more power and a higher redline. New doubled intake-valve springs for 2022 are another upgrade.

DOWNDRAFT INTAKE AND EXHAUST LAYOUT

The DOHC cylinder-head design let our engineers straighten out the CRF250R’s intake and exhaust tracts. The intake is short and just about arrow straight, and the exhaust flows more efficiently too. The straighter ports also help boost low-speed and midrange torque as well as throttle response.

SINGLE-MUFFLER EXHAUST

Using a pressed-alloy design lets us shape the muffler for better rider ergonomics and lighter weight.

SINGLE-PIPE EXHAUST

Along with the single-muffler exhaust, the CRF250R naturally uses a single-pipe header. It routes close to the center of the bike, and its light overall construction helps improve weight distribution.

WIDER WATER-PUMP DRIVE GEARS

Making the water-pump drive gear wider gives it more tooth-engagement area for longer component life.

UPGRADED CAM OILING

To help improve durability, we’ve re-routed the cam’s oil supply this year, as well as giving the CRF250R a more rigid cam holder—better roundness and more oil means less friction and wear.

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.

ENGINE OIL SCAVENGE PUMP

Deep in the engine, there’s a special oil scavenge pump. While you may never see it, it helps keep the CRF250R’s overall design compact.

NEW PRIMARY AND TRANSMISSION RATIOS

To handle the fatter midrange power and torque, we re-engineered the CRF250R’s primary and transmission ratios. The new ratios let our engineers use the same shaft centrelines, so the transmission itself remains light and compact.

NEW SHIFT DRUM

By changing from three to two lead tracks on the shift drum, we’ve improved the shift feel between second and third gears.

GEAR-POSITION ENGINE MAPPING

Talk about smart: The CRF250R features an ECU with special engine mapping for each gear. You can’t give an inch in this class, so having your engine deliver optimal power for each gear choice is one of the features that separates CRF250R riders from the rest.

"H" SECTION CRANK

Look closely at the CRF250R’s crankshaft profile and you’ll see its “H” cross-section design. What’s up with that? Just like a structural “I” beam in an aircraft wing or a skyscraper, it boosts strength and cuts weight over a conventional crank’s shape—a big deal when you consider this part spins at over 14,000 rpm!

LITHIUM-ION BATTERY

Like the rest of the CRF250R, the bike’s Lithium-Ion battery is both super light and high performing. In fact, it weighs less than half the weight of a conventional lead-acid battery.

SHARED ENGINE GEARBOX LUBRICATION

The 2022 CRF250R uses a shared engine/transmission oiling design. Why? Combining the two systems shaves weight and helps make the engine more compact, especially when it comes to placing the right-side cam drive and the clutch so close together.

TITANIUM FUEL TANK

Every gram counts on a bike in the 250 class, which is why the 2022 CRF250R has a titanium fuel tank. Light and strong, it’s also thinner than our previous plastic unit, freeing up more space and helping to centralize fuel mass.

TITANIUM INTAKE AND EXHAUST VALVES

Light is right when it comes to a high-revving engine’s reciprocating masses. That’s why the CRF250R uses titanium intake and exhaust valves. Plus, the valve angle is a super-narrow 20.5 degrees (included). Ovalized valve springs and long-wearing Diamond-Like Carbon (DLC) treated finger rockers complete the package.

TOTAL AIR MANAGEMENT

Total air management means complete attention to how efficiently air gets through the intake, through the head, and out the exhaust. Eliminate losses here, and you make more power everywhere. And the best part? It’s free horsepower you just need a bike with smart design.

TECHNOLOGY

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 CRF250R will do the rest, launching you into the first turn with a big advantage. It turns your bike into a hole shot-seeking machine!

ELECTRIC START

The CRF250R is equipped with an effortless electric starter. Convenient and lightweight, it’s a huge deal if you need to restart a stalled bike in the heat of battle.

PERFORMANCE

MORE MIDRANGE TORQUE AND POWER

The key to riding a 250 fast is to keep it in the power band. The 2022 CRF250R features a new cam, new valve timing, and a new press-fit cam sprocket along with new ignition timing. Together they boost the critical midrange torque and power significantly, giving you the advantage you need.

FUEL INJECTION SYSTEM

By installing the CRF250R’s fuel injector at a 60-degree angle, the injector sprays fuel all the way back to the throttle butterfly. The engine gets a cooler, denser fuel charge for more power and better torque. It’s little details like this that put the CRF250R up front.

BRIDGED-BOX PISTON

The CRF250R’s bridged-box piston is the final piece to the bike's engine performance package. The design features a reinforcing structure between the skirts and the wrist-pin bosses that helps enable the CRF250R’s high redline.

HIGH REDLINE

With our better-breathing DOHC design and the big-bore/short-stroke engine, the CRF250R’s rev limit is way impressive. The same goes for peak power and peak torque.

HIGHER-CAPACITY RADIATOR

When you’re making big power and riding long motos, you need plenty of radiator capacity to keep your engine running strong. No worries—the 2022 CRF250R features six percent more radiator area than last year's design.

HIGH-PERFORMANCE CAM PROFILES

With input directly from our HRC factory team, we’ve given the CRF250R cam profiles that help the engine produce better bottom end torque and power, while still retaining the CRF250R’s screaming peak.

HIGH-VOLUME AIRBOX AND AIR CLEANER

The 2022 CRF250R features an air-cleaner element with plenty of surface area and volume. Plus, the airbox itself has a whopping 78 percent more capacity than last year's design. More air equals more power, especially in the midrange. In addition, we’ve made it easier to service the air filter too.

MORE POWER

Feel free to hold that throttle open and head for the first turn the CRF250R is designed to win that critical hole shot drag race. You’ll also feel the increased low-end to mid-range torque.

THROTTLE BODY

With a 44mm venturi designed to speed up airflow, the CRF250R’s throttle body really reaps benefits at low engine operating speeds. You get power and snap, right now.

HANDLING

REVISED FRAME RIGIDITY

Great handling starts with a superior frame, and that’s one place where the CRF250R’s chassis puts you out front. First, it’s light—over a pound and a half lighter than the previous generations. By making the frame’s main spars narrow, we save weight, but more important we make the chassis more responsive by fine-tuning the lateral rigidity. The result is a bike that gets into, around, and out of corners faster.