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Kawasaki KX450F

Kawasaki KX450F

The KX450 has always been built with one goal in mind: to put riders on the top step of the podium. With over 40 years of KX heritage, Kawasaki now delivers an unrivaled MX1 category machine with a stronger engine mounted in the leanest chassis to date. On top of that, the machine has many class defining features ensuring riders reach the podium in style.

  • RRP:
    £7,599
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    01206 860006

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Launch Control Mode

Factory-style launch control system increases the chance of getting a good start by helping riders maximise traction when starting on a slippery surface.

Easy Engine Tuning: DFI Setting Data Selection

Using the provided DFI couplers, riders can quickly and easily access their choice of three maps (standard, hard, soft) provided in the ECU.

Hydraulic Clutch

Kawasaki’s first hydraulic clutch on a motocrosser offers more direct feel and lighter lever action.

Stronger Brakes

A larger-diameter ø250 mm rear disc complements the oversized ø270 mm front disc, delivering stronger stopping power. A new front brake master cylinder offers better initial control, while contributing to overall braking performance.

KX FI Calibration Kit (Accessory)

KX FI Calibration Controller, a portable handheld calibration tool, enables riders to make changes to engine maps by plugging into the ECU without needing a PC or battery. Comes equipped with seven preset map settings.

Li-ion Battery

Lightweight, compact Li-ion battery helps keep weight gain to a minimum.

Lightweight Aluminium Perimeter Frame

An evolution of the current design, the new frame features revised rigidity and includes the engine as a stressed member. A new swingarm also contributes to the revised rigidity balance and increased rear traction.

Adjustable Ergonomics

A choice of four handlebar positions and two footpeg positions allows riders to tailor their riding position to suit body size and preference.

Factory Styling

Aggressive new bodywork makes the bike look more compact and is complemented by factory-style design and graphics.

Electric Start

Being able to restart an engine quickly after a spill can mean the difference between keeping your lead, or having to fight your way back through the pack.

Light Weight & Light, Nimble Handling

Complementing the powerful engine, light, nimble handling contributes to the KX450’s quick lap times. While the addition of electric start and the return to a coil-spring fork add weight, efforts were made to keep the weight gain to a minimum. The result is the KX450’s leanest chassis to date, and a highly-competitive, low overall weight of only 110.0 kg – a gain of only 1.3 kg.

Finger follower valve actuation

With its factory style components and tuning – including the adoption of a new finger follower valve actuation system - the new engine of the KX450 is now even more powerful with an additional 3.4 PS to keep riders ahead of the pack.

Factory-Inspired Tuning

Works-base bridged-box bottom piston (unique Kawasaki feature used for the first time on a mass-production motocrosser on the 2010 KX450F) is just one of many features inspired by our factory racers.

Adjustable Footpeg Position

Riders can choose from two positions to suit body size and preference. Adjustable footpeg brackets enable riders to lower their footpeg position 5 mm.

Increased Front/Rear Traction

Matching the KX450’s increased power, increased front and rear traction ensure the bike can put power to the ground and get around corners quickly. A largerdiameter front axle (a hint from our racing teams) helps at the front, while revised rear suspension layout and new linkage ratios benefit the rear.

Slim, Ergonomic Bodywork

All-new bodywork (except the front fender and number plate) was designed to facilitate rider movement. Long, smooth surfaces make it easy to slide back and forth. The tank is lower and flatter, making it easier to sit farther forward. Slimmer shrouds are easier to hold on to. Even the engine covers are smooth so that they do not impede rider movement.

Even More Powerful Engine

The new engine boasts an increase in peak power of approximately 2.5 kW (3.4 PS), while a flatter torque curve makes it easier to get on the gas.

Large-Diameter Coil-Spring Fork

Handling suspension duties up front is a new highperformance ø49 mm inverted coil-spring fork. The large diameter inner tubes (the same size as on our factory racers) enables the use of large damping pistons, delivering smooth action and firm damping.

Engine
Engine type Liquid-cooled, 4-stroke Single
Displacement 449 cm3
Bore x stroke 96 x 62.1 mm
Compression ratio 12:5:1
Valve system DOHC, 4 valves
Fuel System Fuel injection: Ø 44 mm x 1
Ignition System Digital DC-CDI
Starting System Electric
Lubrication Forced lubrication, semi-dry sump
Transmission
Transmission 5-speed
Final Drive Chain
Primary reduction ratio 2.727 (60/22)
Gear ratios: 1st 1.750 (28/16)
Gear ratios: 2nd 1.412 (24/17)
Gear ratios: 3rd 1.188 (19/16)
Gear ratios: 4th 1.000 (19/19)
Gear ratios: 5th 0.875 (21/24)
Final Reduction Ratio 3.846 (50/13)
Clutch Wet multi-disc, manual
Brakes & Suspension
Brakes, front Single semi-floating 270 mm petal disc. Caliper: Dual-piston
Brakes, rear Single 250 mm petal disc. Caliper: Single-piston
Suspension, front 49 mm inverted telescopic fork with adjustable compression and rebound damping
Suspension, rear New Uni Trak with adjustable dual-range (high/lowspeed) compression damping, adjustable rebound damping and adjustable preload
Frame & Dimensions
Frame type Perimeter, aluminium
Trail 122 mm
Wheel travel, front 305 mm
Wheel travel, rear 307 mm
Tyre, front 80/100-21 51M
Tyre, rear 120/80-19 63M
Steering angle, left / right 42° / 42°
Dimensions (L x W x H) 2,185 x 830 x 1,275 mm
Wheelbase 1,485 mm
Ground Clearance 340 mm
Fuel capacity 6.2 litres
Seat height 955 mm
Curb Mass 110 kg