With more Supercross and Motocross championships than any other manufacturer, the KX name is synonymous with winning. The KX450 motorcycle represents the flagship of the KX lineup, built with the sole purpose of dominating the track. Over the past four decades, we’ve learned what it takes to win and stay on top. Our dedication to building the ultimate machine is undeniable, and the KX450 represents this to the fullest.
Built to Win
The KX™450 engine delivers broad, useable torque and strong, responsive power across the rev range. From the starting gate to the finish line, this race-ready machine is built to stay ahead of the pack.
Leave Them in the Dust
Take the lead with proven race-winning performance. The highly adjustable suspension package delivers smooth action, firm damping and contributes to optimal traction.
Ride With Confidence
From quick, reliable starting to advanced braking power, the KX™450 motorcycle offers superior features designed to inspire confidence. What’s more, this race-ready machine is backed by decades of championship-proven experience.
Made To Shave Lap Times
Experience the race-winning advantage of a strong and lightweight chassis, agile handling and exclusive ERGO-FIT technology.
Engine
4-stroke Single
Displacement
449 cm3
Bore x Stroke
96.0 × 62.1 mm
Compression Ratio
12.5:1
Valve System
DOHC, 4 valve
Fuel System
Fuel injection (o44 × 1)
Ignition
Digital
Starting
Electric
Cooling
Liquid-cooled
Lubrication
Forced lubrication, semi-dry sump
Transmission
5-speed, return
Primary Reduction Ratio
2.727 (60/22)
Gear Ratio: 1st
1.750 (28/16)
Gear Ratio: 2nd
1.412 (24/17)
Gear Ratio: 3rd
1.188 (19/16)
Gear Ratio: 4th
1.000 (19/19)
Gear Ratio: 5th
0.875 (21/24)
Final Reduction Ratio
3.846 (50/13)
Clutch
Wet multi-disc, manual
Final Drive
Chain
Frame
Perimeter, aluminium
Front Suspension
49 mm inverted telescopic fork with adjustable compression and rebound damping
Rear Suspension
Uni Trak with adjustable dual-range (high/low-speed) compression damping, adjustable rebound damping and adjustable preload
Front Wheel Travel
305mm
Rear Wheel Travel
307mm
Rake
27.6o
Trail
122mm
Steering Angle (L/R)
42? / 42?
Front Tyre
80/100-21 51M
Rear Tyre
120/80-19 63M
Front Brake/s
Single semi-floating o270 mm petal disc
Front Caliper/s
Dual-piston
Rear Brake
250 mm petal disc
Rear Caliper
Single-piston
Dimensions (LxWxH)
2185 × 820 × 1265
Overall Length
2185
Overall Width
820
Overall Height
1265
Wheelbase
1485
Road Clearance
340
Seat Height
955
Curb Mass
110 kg
Fuel Capacity
6.2L