A closer look at the 2021 Honda CRF450R
Many parts of the 2021 CRF450R are new. This is a direct legacy of the development work done by HRC and reigning world champion Tim Gajser's team on the 450 CRF2019RW. The frame and swingarm are new, as is the suspension, resulting in weight savings and a significant improvement in cornering behavior.
The engine has been redesigned on the intake and exhaust sides (which now have a single manifold again) for a milder engine character in the midrange, while the decompression system has been replaced. A hydraulically operated clutch offers better control with an easier-to-operate lever, the bodywork is even more compact and the saddle is narrower, which improves freedom of movement.
General
The CRF450R has been considered the benchmark since its launch in 2002. From the rider's perspective, whether amateur or competitive, the CRF450R has always been a bike that offers total control and the power combined with the reliability that Honda is known for.
Of course, the CRF450R has never stopped evolving, with every improvement coming from the experience gained in the field through the racing programs Honda has pursued around the world. In 2017, revolution followed evolution. In 2018, the introduction of an electric starter (optional in 2017) further increased its attractiveness. In 2019, a cylinder head developed by HRC made it possible to significantly increase power and torque. And in 2020, the CRF450R adopted the Honda Selectable Torque Control (HSTC) system and this engine formed the basis for HRC to build the CRF450RW, the bike on which Tim Gajser became world champion.
The 2021 CRF450R, in turn, owes a lot to what the number 243 and HRC learned and developed on the way to that title.
Most important features
The CRF450R offers a long list of improvements for 2021. For starters, 2kg has been gained on the frame and subframe. Extensive work was then done on adjusting the stiffness of the frame and swingarm, on new geometry – for more responsive steering characteristics – on increased ground clearance and on changes to the suspension. All this with the aim of making the motorcycle more efficient in the corners. Feedback from Tim Gajser's winning season has also been used to address a number of issues to reduce rider fatigue and improve lap times – for professionals and amateurs of all levels.
The engine also benefited from HRC's vast experience, which focused on low- and mid-range torque. At the same time, the decompressor has been moved, the airbox volume has been increased and the throttle body has been redesigned, as have the exhaust ducts. The manifold is also new, while a single muffler replaces the previously used dual muffler system.
Finally, a hydraulically operated clutch provides smoother lever action and less rider fatigue. The weight reduction focuses on the more compact fuel pump and magnesium head cover, while new, lighter and thinner plastics make it easier for the rider to move around. This also includes a saddle that is thinner and narrower at the back. The new graphics complete the 2021 evolutions.
Technical data CRF450R 2021 (Type ED)
Motor
Block 4-stroke, mono-cylinder liquid-cooled
Cylinder capacity 449,7 cc
Bore x stroke 96 x 62,1 mm
Compression ratio 13,5 to 1
Oil capacity 1,25 liter
Nutrition
Carburetion Electronic injection PGM-FI
Fuel capacity 6,3 liter
Electrical system
Ignition Digital ignition with electronic ignition advance
starten Electric starter
Transmission
Link multi-plate coupling
Number of gears 5
Final drive chain
Bicycle part
Frame Aluminum Twin Spar cradle frame
Dimensions (LxWxH) 2.182 x 827 x 1.267 mm
Wheelbase 1.481 mm
Head tube angle 27°1′.
Follow-up 114 mm
Seat height 965 mm
Ground clearance 336 mm
Weight 105,8 kg
Suspension
In front ø 49 mm Showa inverted spring fork, adjustable in compression and rebound damping. Suspension travel 310 mm
At the back Type Pro-Link with Showa monoshock, adjustable in preload, compression and rebound damping. Ferry route NB
Wheels
Wheels aluminum wire spoke rims
Front wheel 21 x 1,60
Rear wheel 19 x 2.15
Front tires 80/100-21 51M Dunlop MX33F
Rear tires 120/80-19 63M Dunlop MX33
Remmen
For brake Single disc ø 260 mm with double piston caliper and sintered brake pads
Rear brake Single disc ø 240 mm with single piston caliper and sintered brake pads
Photos: Honda
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