The Kawasaki KX450F is the top-of-the-line motocross motorcycle offered by the brand. It features a liquid-cooled four-stroke engine that offers hard-hitting power. It gets a 5-speed transmission with a durable chain drive. This motocrosser comes with factory-inspired styling that looks quite aggressive and sporty. The chassis components of the KX450F have been redesigned to reduce its curb weight significantly.
Kawasaki KX450F Top Speed, Specifications, Price, & Review
Key Specifications
| Price | $8,849 |
| Engine | 1-Cylinder, 4-stroke |
| Displacement | 449cc |
| Transmission | 5-Speed |
| Power | 51.8 hp @ 8,900 rpm |
| Seat Height | 950 mm |
| Curb Weight | 108.8 kg |
| Fuel Tank Capacity | 6.3 liters |
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Top Features
- Perimeter frame made of aluminum
- Redesigned chassis components
- Factory-inspired graphics and design
- Slim radiator shrouds
- 49 mm Separate function front forks with triple air chambers
- Titanium coating on front forks
- Fully adjustable Uni-Trak rear suspension with spring preload
- Petal front disc brake with semi-floating dual caliper
- Petal rear disc brake with single-piston caliper
- Four-position adjustable handlebar
- Adjustable footpeg position
- Liquid-cooled, four-stroke engine
- Battery-less fuel injection system
- Lightweight ECU with three engine maps
- Launch control system
- KX FI calibration controller kit
- 5-Speed transmission
- Semi-dry sump with forced lubrication system
Kawasaki KX450F Review
Beginning with the frame, the flagship motocross is built on the same perimeter frame as the smaller KLX 140R. Instead of high tensile steel, the Kawasaki KX450F chassis is made of aluminum which helps it achieve light body weight. Its sleek body design bodes well with its slimmer and lightweight frame. It comes fitted with 49 mm inverted separate function forks with a triple air chamber. The rear end of this motocrosser is equipped with a fully adjustable Uni-Trak shock absorber with a spring preload. Kawasaki KX450F offers a front and rear wheel travel of 305 mm. It gets a 270 mm petal disc brake with a 2-piston caliper on the front wheel and a 240 mm petal disc brake with a 1-piston caliper on the rear wheel.
It is equipped with a 449cc single-cylinder engine with double overhead camshafts. The Kawasaki KX450F gets a battery-less fuel injection system and liquid cooling system. It comes with a DC-CDI ignition system which is also seen on the Kawasaki KLX 110R. This motocrosser churns out 51.8 hp of maximum power and 32.9 lb-ft of maximum torque. The Kawasaki KX450F top speed is nearly 90 mph but it may vary depending on the rider’s weight & riding conditions. It comes paired with a 6-speed transmission and it gets a wet multi-plate clutch. This motocrosser has a curb weight of only 108.8 kg which makes it very agile. KX450F seat height is 950 mm and its ground clearance is 335 mm.
Competitors
The 450cc motocross segment is quite competitive as each popular brand has a model on sale in this segment. The Kawasaki KX450F competitors are Husqvarna FC 450, KTM 450 SX-F, Honda CRF450R, Suzuki RM-Z450, and Yamaha YZ450F. Among the 450cc motocrosser, the Husqvarna FC 450 comes out at the top in terms of power and torque output followed by the Honda CRF450R.
Kawasaki KX450F Price and Variants
Kawasaki has replaced this motocrosser with the all-new KX450. During its production years, the KX450F was available in only one variant. The last recorded price of the Kawasaki KX450F is $8,849.
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Kawasaki KX450F Specifications
Engine & Transmission
| Engine Type | 1-Cylinder, 4-stroke, DOHC |
| Engine Displacement | 449cc |
| No. of Cylinders | 1 |
| Fuel Type | Petrol |
| Fuel Supply | Fuel injection |
| Cooling System | Liquid cooling |
| Bore | 96 mm |
| Stroke | 26.1 mm |
| Compression Ratio | 12.8:1 |
| Valves Per Cylinder | 4 |
| Starting | Primary kick |
| Ignition | Digital DC-CDI |
| Transmission | 5-Speed |
| Clutch | Wet, multi-disc, manual |
| Final Drive | Chain |
Top Speed Performance, & Mileage
| Power | 51.8 hp @ 9,300 rpm |
| Torque | 32.9 lb-ft @ 7,800 rpm |
| Top Speed | Kawasaki KX450F top speed is 90 mph |
| Mileage | 25-30 mpg |
| 0-60 mph | 14-15 seconds |
Chassis & Suspension
| Body Type | Motocross |
| Chassis | Aluminum perimeter frame |
| Front Suspension | 49 mm Inverted separate function forks |
| Rear Suspension | Uni-Trak shock absorber with spring preload |
| Front Wheel Travel | 305 mm |
| Rear Wheel Travel | 305 mm |
Brakes, Wheels, & Tires
| Front Brake | Petal disc with semi-floating 2-piston caliper |
| Rear Brake | Petal disc with single-piston caliper |
| Front Brake Diameter | 270 mm |
| Rear Brake Diameter | 240 mm |
| ABS | No |
| Front Wheel | 21 Inch, spoked rims |
| Rear Wheel | 19 Inch, spoked rims |
| Tire Type | Tubed |
| Front Tire Size | 80/100-21 51M |
| Rear Tire Size | 120/80-19 63M |
Dimension & Capacity
| Wheelbase | 1,495 mm |
| Length | 2,195 mm |
| Width | 820 mm |
| Height | 1,280 mm |
| Seat Height | 950 mm |
| Ground Clearance | 335 mm |
| Curb Weight | 108.8 kg |
| Fuel Tank Capacity | 6.3 liters |
| Seating Capacity | 1 |
Electricals & Lighting
| Battery Type | No battery |
| Battery Capacity | 0 |
| Headlight | No |
| Pilot Lights | No |
| Taillights | No |
| Turn Signals | No |
| Pass Light | No |
Instrument Console & Speedometer
| Console Type | No instrument console |
| Speedometer | No |
| Tachometer | No |
| Odometer | No |
| Trip Meter | No |
| No. of Trip Meters | No |
| Fuel Gauge | No |
| Gear Shift Light | No |
| Gear Position Indicator | No |
| Low Fuel Indicator | No |
| Engine Temperature Indicator | No |
| Service Indicator | No |
Other Features
| Electric Starter | No |
| Engine kill Switch | No |
| Stand Alarm | No |
| Stepped Seat | No |
| Pillion Seat | No |
| Pillion Grabrails | No |
| Pillion Footrest | No |
| Underseat Storage | No |
| Additional Features | Adjustable motocross ECU, Rear intake ducts |
Conclusion On the Kawasaki KX450F
The KX450F is a first-class motocrosser that promises championship-winning performance and handling. Its single-cylinder powertrain uses a unique battery-less FI system that offers uninterrupted power delivery. The DOHC engine gets some minor updates and it is very reliable. The high-end suspension setup along with a lightweight and compact chassis brings out razor-sharp handling. The Kawasaki KX450F is one of the finest motocrossers that offers amazing power and control.
Frequently Asked Questions
The single-cylinder engine of the KX450F is capable of producing 51.8 hp @ 9,300 rpm.
It has a ground clearance of 335 mm.
This motocrosser has a curb weight of 108.8 kilograms.
Yes, it is equipped with petal-type disc brakes on the front and rear wheels.
