Please note: This product may not be available in-store currently, so please contact us to find out about availability.
When engineers approached the 2021 CRF450R project, they identified "Razor Sharp Cornering" as the development theme, which led to three main goals: Improve power, improve handling and improve consistency. The first point was addressed by making changes intended to increase the engine's horsepower and torque, particularly in the bottom end of the range. The second objective was addressed by optimizing chassis rigidity, altering geometry and reducing vehicle weight. The final goal—regular, steady performance by both the machine and the rider—was pursued via updates to the clutch, as well as the vehicle layout for improved rider movement.
As is often the case, benefits overlapped, with improvements in one area leading to benefits in other areas. For example, the power and torque increase result in changes to power delivery that make the machine more manageable in corners. Similarly, the reduced weight not only aids cornering but promotes a more consistent performance by the rider over the course of a race.
Speaking of weight savings, the reduction here is an example of something that was only achievable during an overall redesign, and only by accumulating small benefits in myriad areas. As the Japanese saying goes, "With enough dust, a mountain can form," and in this case, the mountain was represented by a 3-pound overall weight reduction compared to last year's model.
- The CRF450R engine has undergone a number of significant updates aimed at improving bottom-end and midrange power, making for a linear delivery that is strong but manageable, even as the rider tires. In addition, peak power is up .8 horsepower, above 5,000 rpm
- The engine's exhaust port has been centralized, ovalized and straightened, achieving improved exhaust efficiency and revised torque characteristics, for a linear delivery that continues into the high rpm range
- For 2021, the CRF450R makes the switch from two mufflers to one, reducing weight and improving bottom-end torque delivery. The entire exhaust system now weighs 8.5 pounds, a reduction of 2.7 pounds from the previous model
- To facilitate clutch actuation and encourage consistent performance, a hydraulic clutch is now utilized as on the HRC factory machines. As a result, the force needed to pull the handlebar lever is reduced. Depending on where in the lever stroke the measurement is taken, the reduction can be as much as 10% compared to the previous model, even with the stiffer springs
- An all-new frame uses narrower main spars, a redesigned downtube and features rearranged reinforcement ribbing on the backside of the pivot plate, changes that contribute to an overall weight reduction of 1.54 pounds, with the new frame weighing just 18.5 pounds. Lateral rigidity is reduced by 20%—resulting in a supple feel that improves cornering—while vertical rigidity is maintained
- The Pro-Link® rear-suspension system uses a Showa shock absorber whose shape has been adapted to work with the new frame, with adjusters moved from the left side to the right. Weight was cut here as well, by switching to an ultra-light steel shock spring
- The 2021 CRF450R comes with Dunlop's excellent Geomax MX33 tires, generally considered to be the industry standard for soft to intermediate terrain. Developed with the help of top motocross pros, MX33s feature technologies that deliver superior grip, slide control, bump absorption and durability
|Type||449.7cc liquid-cooled 10º single-cylinder four-stroke|
|Valve Train||Unicam® OHC, four-valve; 38mm intake, titanium; 31mm exhaust, steel|
|Bore x Stroke||96.0mm x 62.1mm|
|Induction||Programmed fuel-injection system (PGM-FI); 46mm throttle bore|
|Starter||Push-button electric starter|
|Transmission||Constant-mesh 5-speed; manual|
|Clutch||Multiplate wet, hydraulically actuated (6 springs, 8 plates)|
|Final Drive||#520 chain; 13T/49T|
|Front||49mm fully adjustable leading-axle inverted telescopic Showa coil-spring fork w/ 12.2 in. travel|
|Rear||Pro-Link system; fully adjustable Showa single shock w/ 12.4 in. wheel travel|
|Front||2-piston calliper (30mm, 27mm) hydraulic; single 260mm disc|
|Rear||1-piston calliper hydraulic; single 240mm disc|
|Front||Dunlop Geomax MX33 80/100-21 w/ tube|
|Rear||Dunlop Geomax MX33 120/80-19 w/ tube|
Dimensions & Weight
|Rake (Caster Angle)||27°7’|
|Ground Clearance||13.2 in.|
|Seat Height||38.0 in|
|Curb Weight*||244 lbs (110.67 kg)|
We are proud to be partnered with trusted finance and insurance partners to get you sorted with peace of mind, for both in-store and online purchases. See our full range of finance and insurance here.
Finance & Insurance
Get in touch with our team today to see if this bike is right for your needs. We'll arrange a consultation or test ride and help make it happen.
Sizing Charts by Brand (Under construction)
Please note: We're currently developing this feature to provide you with accurate and complete information around sizing.
Listed by brand (in alphabetical order). Here you can find up-to-date sizing charts. If you have further questions, or if we've missed something, reach out and our team can assist.
|6D Helmets||Airoh Helmets||Alpinestars|
|Arai Helmets||Asterisk||Atlas Braces|
|Five||Fly Racing||Fox Racing|
Looking for Something? Shop by brand
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.