Motorcycles 2021 Kawasaki KX450
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- Powerful, easy-to-ride engine
- Great suspension provides a plush yet progressive feel
- Best-in-class chassis due to its nimble maneuverability and overall comfort
- Agreeable ergonomics thanks to the new handlebar
- Effortless clutch pull
- Although subtle, Kawasaki kept improvements coming
- Sensitive rear brake could lock up the rear wheel
- EFI couplers are long in the tooth
- No handlebar-mounted engine map select button
The 2021 Kawasaki KX450 is an excellent and well-rounded package with subtle updates that make it even better.
Best Motocross Bike Winner—2021 Kawasaki KX450
Three-peat for Team Green in the 450 Motocross ShootoutRelated: 2021 Kawasaki KX450 Review First Ride
With competition as fierce as it is in the full-size motocross category, the three consecutive victories thathas garnered with the KX450 in the is nothing short of impressive. The 2021 model because, simply put, it does everything very well.
Updates for 2021
Despite two previous victories, Kawasaki R&D kept plugging away at improvements, asfor 2021. This includes a new coned disc-spring hydraulic clutch, larger-diameter clutch plates with a revised friction material, piston skirt that utilizes a new dry film lubricant coating, and new Renthal Fatbar handlebar.
2021 Kawasaki KX250X Review First Ride
Riding Kawasaki’s new 250cc four-stroke cross-country motorcycle.Related: 2021 Kawasaki KX250 Review First Ride
Pricing and Variants
Priced at $9,399, this model is tied with the Yamaha YZ450F and GasGas MC 450F as the second cheapest model in the 450 four-stroke category. The Suzuki RM-Z450 is $400 cheaper at $8,999.
Powertrain: Engine, Transmission, and Performance
The KX450′s liquid-cooled, DOHC, single-cylinder 449cc engine is characterized by its quick-revving, reactive engine character and controllable power delivery. In theAndrew Oldar said, “It makes decent power throughout the rpm range, is very lively, and has a super-crisp throttle response. The KX450 doesn’t have the most torque, hit, or over-rev, but is a user-friendly engine that is controllable and predictable.”
On our in-house dyno, the52.4 hp at 9,600 rpm and 32.6 pound-feet of torque at 7,000 rpm.
2021 Kawasaki KLX300 First Look Preview
Kawasaki expands its dual sport line in 2021 with the KLX300.The new KLX300 will be powered by a 292cc single, featuring a lightweight piston, pin and connecting rod, electrofusion cylinder, and cam profiles derived from the 300R. Ignition timing and a gear-driven engine balancer are calibrated to reduce vibrations as much as possible, a boon to riders planning any longer trips on the new 300. The mill is mounted low in the high-tensile-steel, box-section perimeter frame, and gear ratios were chosen to hit the sweet spot between off-road capability and on-road performance.
The Nissin hydraulic clutch makes the pull extremely easy and remarkably light when working through the five-speed transmission.
The aluminum perimeter frame and Showa suspension work well together to absorb impacts and are firm enough to respond well to rider inputs. Overall,the KX450 “is very maneuverable, corners easily, and is able to change lines at a moment’s notice while still being stable and predictable at speed,” all of which make it the best-handling chassis in the class.
The Kawasaki is fitted with a Nissin two-piston caliper and 270mm disc out front and a Nissin one-piston caliper and 250mm disc out back. The latter pairing drew some complaints because it was a bit touchy and easy to lock up.
Fuel Economy and Real-world MPG
Real-world miles per gallon is not currently recorded. The KX450, like the Yamaha YZ450F, has a 1.6-gallon tank, which is smaller than the 1.7 or 1.8 gallons of fuelcan hold.
2021 Kawasaki KX250 Dyno Test
How much power does Kawasaki’s 250 four-stroke motocross bike make in 2021?Although the Kawasaki KX250 enjoyed a plethora of engine updates last year despite the fact that the powerplant itself didn’t look all that much different on the outside, Team Green’s 250 four-stroke motocrosser received even more changes for the 2021 model year including electric start, a revised crank web, 3mm-longer connecting rod, different combustion chamber design, flatter piston crown, a higher spring rate for the outer valve springs, 2mm-wider cam chain, revised cylinder water jacket, thicker cylinder wall, updated ECU settings, and a coned disc-spring hydraulic clutch.
Ergonomics: Comfort and Utility
The Kawasaki KX450′s Ergo-Fit allows for handlebar, footpeg, and seat adjustments, but that’s not the only reason the bike’s ergonomics are comfortable. The bike’s thin structure and flat seat allow for ample rider movement, and the new Renthal Fatbar 839-bend handlebar improves the rider triangle compared to the previous setup.
The KX450 is fitted with Kawasaki’s launch control as well as three optional EFI couplers, the latter of which seem outdated since the bike’s competitors have a handlebar-mounted engine map select button.
Warranty and Maintenance Coverage
Warranty is not available for this model.
The Kawasaki KX450 offers an enjoyable ride, improved ergonomics, great suspension, and an easy clutch pull, all for an agreeably priced, well-rounded package.
2021 Kawasaki KX450 Claimed Specifications
|Engine:||449cc, DOHC, liquid-cooled, single-cylinder four-stroke|
|Bore x Stroke:||96.0 x 62.1mm|
|Fuel Delivery:||DFI w/ 44mm Keihin throttle body|
|Clutch:||Wet, multiplate, hydraulically actuated|
|Engine Management/Ignition:||Digital CDI w/ 3 coupler options|
|Front Suspension:||49mm Showa coil-spring fork, compression and rebound damping adjustable; 12.0 in. travel|
|Rear Suspension:||Showa shock, fully adjustable; 12.1 in. travel|
|Front Brake:||Nissin 2-piston caliper, 270mm disc|
|Rear Brake:||Nissin 1-piston caliper, 250mm disc|
|Wheels, Front/Rear:||Spoked wheels|
|Tires, Front/Rear:||80/100-21 / 120/80-19|
|Ground Clearance:||13.4 in.|
|Seat Height:||37.6 in.|
|Fuel Capacity:||1.6 gal.|
|Wet Weight:||243 lb.|
Cycle World Tested Specifications
|Seat Height:||38.0 in.|
|Wet Weight:||244 lb.|
|Rear-wheel Horsepower:||52.4 hp @ 9,600 rpm|
|Rear-wheel Torque:||32.6 lb.-ft. @ 7,000 rpm|
Kawasaki's new bike for 2021 WSBK season breaks cover .
Kawasaki has become the fourth World Superbike manufacturer to unveil its 2021 bike after Ducati, Honda and Yamaha. © Kawasaki Racing Team Jonathan Rea, Kawasaki Racing Team WorldSBK, Alex Lowes, Kawasaki Racing Team WorldSBK The Japanese marque took the covers off its new Ninja ZX-10RR in an online presentation from its WSBK factory on Wednesday, a day before the start of official pre-season testing in Barcelona, Spain. The bike carries essentially the same colour scheme as last year, with Kawasaki electing to retain its distinctive green-and-black livery.