When it comes to KX motorcycles, winning runs in the family. The all-new cross-country KX450X motorcycle is powered by technology that hails from a legacy of champions and tuned to take on the toughest terrain. Get the off-road edge on the bike built to ride ahead of the rest.

Power Ahead

The same championship-proven engine performance found in KX motocross bikes is what propels the all-new KX450X motorcycle. This fuel-injected 449cc 4-stroke engine delivers the type of hard-hitting power and a flat torque curve that encourages quick acceleration. Engine maps are optimized for cross-country racing, delivering the ideal amount of useable power. Electric start makes starting the engine as easy as a push of a button. A coned disc-spring hydraulic clutch offers a direct feel, light lever action, and consistent performance.

Gain Full Control

Light and nimble handling is achieved thanks to the lean, lightweight chassis of the legendary KX450 motocross bike. A well-balanced aluminum perimeter frame helps keep the overall weight down and allows for slim ergonomics. The high-performance, race-ready suspension has been optimized for cross-country racing, especially on aggressive trails. Large-diameter brakes deliver strong stopping power, offering a high level of control.

Take on Tough Trails

The KX450X motorcycle is built to meet the tough demands of cross-country racing. Cross-country wheels (F21”/R18”) are paired with specific Dunlop Geomax AT81 tires developed for GNCC racing. A factory-style skid plate and a convenient side stand both come as standard equipment.

Get The Perfect Fit

Slim ergonomics stem from a narrow frame and minimalist bodywork. To help facilitate the perfect fit, the KX450X motorcycle features ERGO-FIT adjustability. Four handlebar positions and two footpeg positions allow you to tailor the KX450X to your body size, riding style and preference.

POWER

  • 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

                                      3.923 (51/13)

                                      • 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

                                                        120mm

                                                        • Steering Angle (L/R)

                                                          42? / 42?

                                                          • Front Tyre

                                                            80/100-21 51M

                                                            • Rear Tyre

                                                              120/90-18 65M

                                                              • Front Brake/s

                                                                Single semi-floating o270 mm petal disc

                                                                • Front Caliper/s

                                                                  Dual-piston

                                                                  • Rear Brake

                                                                    240 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

                                                                                  335

                                                                                  • Seat Height

                                                                                    950

                                                                                    • Curb Mass

                                                                                      111.6 kg

                                                                                      • Fuel Capacity

                                                                                        6.2L

                                                                                      • PERFORMANCE

                                                                                        • 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

                                                                                                                            3.923 (51/13)

                                                                                                                            • 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

                                                                                                                                              120mm

                                                                                                                                              • Steering Angle (L/R)

                                                                                                                                                42? / 42?

                                                                                                                                                • Front Tyre

                                                                                                                                                  80/100-21 51M

                                                                                                                                                  • Rear Tyre

                                                                                                                                                    120/90-18 65M

                                                                                                                                                    • Front Brake/s

                                                                                                                                                      Single semi-floating o270 mm petal disc

                                                                                                                                                      • Front Caliper/s

                                                                                                                                                        Dual-piston

                                                                                                                                                        • Rear Brake

                                                                                                                                                          240 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

                                                                                                                                                                        335

                                                                                                                                                                        • Seat Height

                                                                                                                                                                          950

                                                                                                                                                                          • Curb Mass

                                                                                                                                                                            111.6 kg

                                                                                                                                                                            • Fuel Capacity

                                                                                                                                                                              6.2L

                                                                                                                                                                            • DETAILS

                                                                                                                                                                              • 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

                                                                                                                                                                                                                  3.923 (51/13)

                                                                                                                                                                                                                  • 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

                                                                                                                                                                                                                                    120mm

                                                                                                                                                                                                                                    • Steering Angle (L/R)

                                                                                                                                                                                                                                      42? / 42?

                                                                                                                                                                                                                                      • Front Tyre

                                                                                                                                                                                                                                        80/100-21 51M

                                                                                                                                                                                                                                        • Rear Tyre

                                                                                                                                                                                                                                          120/90-18 65M

                                                                                                                                                                                                                                          • Front Brake/s

                                                                                                                                                                                                                                            Single semi-floating o270 mm petal disc

                                                                                                                                                                                                                                            • Front Caliper/s

                                                                                                                                                                                                                                              Dual-piston

                                                                                                                                                                                                                                              • Rear Brake

                                                                                                                                                                                                                                                240 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

                                                                                                                                                                                                                                                              335

                                                                                                                                                                                                                                                              • Seat Height

                                                                                                                                                                                                                                                                950

                                                                                                                                                                                                                                                                • Curb Mass

                                                                                                                                                                                                                                                                  111.6 kg

                                                                                                                                                                                                                                                                  • Fuel Capacity

                                                                                                                                                                                                                                                                    6.2L

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