Pre-Owned 2021 Kawasaki KX450 – Championship-Proven 450cc Motocross Bike
The 2021 Kawasaki KX450 is a race-focused motocross machine engineered for riders who demand maximum power, precision handling, and proven reliability on the track. Powered by a potent 449cc liquid-cooled 4-stroke engine, the KX450 delivers explosive acceleration, strong mid-range torque, and top-end performance designed to dominate competitive racing environments.
Built on a lightweight aluminum perimeter frame, the KX450 offers razor-sharp handling and excellent stability through corners, jumps, and rough terrain. Advanced technology like Launch Control Mode, Power Mode Selection, and ERGO-FIT® adjustable ergonomics allows riders to tailor performance and comfort to their riding style.
With race-tuned Showa suspension, powerful braking performance, and Kawasaki’s unmistakable KX styling, the 2021 KX450 remains a top choice for serious motocross riders and racers.
- Engine & Drivetrain
- Engine Type Liquid‑Cooled 4‑Stroke Single‑Cylinder, DOHC, 4‑Valve
- Displacement 449 cc
- Bore x Stroke 96.0 mm x 62.1 mm
- Compression Ratio 12.5 : 1
- Fuel System DFI® Electronic Fuel Injection with 44 mm Keihin Throttle Body
- Ignition Digital DC‑CDI
- Starter Electric
- Transmission 5‑Speed Manual, Return Shift
- Clutch Wet Multi‑Disc Hydraulically Actuated
- Final Drive Chain
- Suspension & Brakes
- Front Suspension 49 mm Inverted Telescopic Fork; Adjustable Compression & Rebound; ~12.0 in Travel
- Rear Suspension New Uni‑Trak® Monoshock with Adjustable Preload, Compression & Rebound; ~12.1 in Travel
- Front Brakes Single 270 mm Petal Disc with Dual‑Piston Caliper
- Rear Brakes Single 250 mm Petal Disc with Single‑Piston Caliper
- Tires & Wheels
- Front Tire 80/100‑21
- Rear Tire 120/80‑19
- Wheels Aluminum Spoked Wheels
- Dimensions & Capacities
- Overall Length 86.0 in (2,185 mm)
- Overall Width 32.3 in (820 mm)
- Overall Height 49.8 in (1,265 mm)
- Wheelbase 58.5 in (1,485 mm)
- Ground Clearance ~13.4 in (340 mm)
- Seat Height ~37.4 in (950 mm)
- Fuel Capacity 6.2 L (~1.64 gal)
- Wet Weight ~243 lb (110.2 kg)
- Features & Equipment
- Launch Control Mode (KLCM) Standard Race‑Assist Technology
- Hydraulic Clutch Coned Disc‑Spring Actuated Hydraulic Clutch
- Ergo‑Fit Adjustable Rider Ergonomics System
