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KX450 2025
Product #KAW-KX250-2025
The KX legacy created a long line of champions. The drive to produce more has not slowed down. Our all-new flagship race machine, the KX450, offers next-level engineering and power to dominate the track. Over the decades, we’ve learned what it takes to win and stay on top. The KX450 embodies this legacy to the fullest.
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Specification | Details |
---|---|
Engine Type | 449cc liquid-cooled, DOHC, four-stroke single |
Bore x Stroke | 96.0mm x 62.1mm |
Compression Ratio | 13.5:1 |
Fuel Delivery | DFI® with 44mm Keihin throttle body |
Ignition | Digital DC-CDI |
Transmission | 5-speed manual |
Final Drive | Chain |
Frame Type | Aluminum perimeter |
Front Suspension | 49mm Showa coil-spring inverted fork; fully adjustable; 12.0 in. travel |
Rear Suspension | Uni-Trak® Showa single shock; fully adjustable; 12.1 in. travel |
Front Brake | Single 270mm hydraulic disc, two-piston caliper |
Rear Brake | Single 240mm hydraulic disc, single-piston caliper |
Front Tire | 80/100-21 |
Rear Tire | 120/80-19 |
Wheelbase | 58.9 in. |
Seat Height | 37.6 in. |
Ground Clearance | 13.2 in. |
Fuel Capacity | 1.7 gallons |
Curb Weight | 244.2 lbs (ready to ride, including fluids) |
Additional Features | Electric start, handlebar-mounted launch control, selectable engine maps, |
hydraulic clutch, advanced cooling system, lightweight swingarm |

The KX legacy created a long line of champions. The drive to produce more has not slowed down. Our all-new flagship race machine, the KX450, offers next-level engineering and power to dominate the track. Over the decades, we’ve learned what it takes to win and stay on top. The KX450 embodies this legacy to the fullest.