2021 Kawasaki KX™ 450X
POWER
- Engine4-stroke single, DOHC, liquid-cooled
- Displacement249cc
- Bore x Stroke78.0 x 52.2mm
- Compression Ratio14.1:1
- Fuel SystemDFI® with 44mm Keihin throttle body and dual injectors
- IgnitionDigital CDI
- Transmission5-speed, return shift, with wet multi-disc manual clutch
- Final DriveChain
PERFORMANCE
- Front Suspension / Wheel Travel48mm inverted telescopic coil spring fork with 23-way compression damping and 20-way rebound damping /12.4 in
- Rear Suspension / Wheel TravelUni-Trak® with dual-range (2.25 turns high speed/21-way low-speed) compression damping, 38-way rebound damping and adjustable preload/12.4 in
- Front Tire80/100-21
- Rear Tire110/100-18
- Front BrakesSingle semi-floating 270mm Braking® petal disc with dual-piston caliper
- Rear BrakesSingle 240mm Braking® petal disc with single-piston caliper
DETAILS
- Frame TypeAluminum perimeter
- Rake/Trail27.8/4.8 in
- Overall Length85.4 in
- Overall Width32.3 in
- Overall Height49.6 in
- Ground Clearance13.0 in
- Seat Height37.2 in
- Curb Weight230.2 lb without fuel / 240.2 lb**
- Fuel Capacity1.64 gal
- Wheelbase58.3 in
- Color ChoicesLime Green
Engine
- Engine Type:Single-Cylinder
- Cylinders:1
- Engine Stroke:4-Stroke
- Cooling:Liquid
- Valves:4
- Valves Per Cylinder:4
- Valve Configuration:DOHC
- Bore (mm):96
- Bore (in):3.78
- Stroke (mm):62.1
- Stroke (in):2.45
- Displacement (cc):449
- Displacement (ci):27.4
- Compression Ratio:12.5:1
- Starter:Electric
- Fuel Requirements:Regular
- Fuel Type:Gas
Brakes
- Front Brake Type:Disc
- Front Brake Diameter (in):10.6
- Front Brake Diameter (mm):270
- Rear Brake Type:Disc
- Rear Brake Diameter (in):9.8
- Rear Brake Diameter (mm):250
Carburetion
- Carburetion Brand:Keihin
- Fuel Injector:Yes
- Fuel Injector Size (mm):44
- Carburetion Type:Fuel Injected
Dimensions
- Length (in):86
- Length (mm):2184.4
- Width (in):32.3
- Width (mm):820.4
- Height (in):49.8
- Height (mm):1264.9
- Wheelbase (in):58.5
- Wheelbase (mm):1485.9
- Ground Clearance (in):13.2
- Ground Clearance (mm):335.3
- Length (ft):7.17
- Length (ft/ft):7
- Length (ft/in):2
Other
- Fuel Capacity (gal):1.64
- Fuel Capacity (l):6.2
- Frame:Aluminum
- Body Material:Plastic
- Side Cover:Yes
- Engine Case Guard:Yes
- Fork Guards:Yes
- Exhaust Guard:Yes
- Foot Peg Location:Driver
- Adjustable:Yes
- Front Suspension Type:Inverted Fork
- Front Suspension Size (in):1.9
- Front Suspension Size (mm):49
- Front Travel (in):12
- Front Travel (mm):304.8
- Front Adjustable Rebound Damping:Yes
- Front Suspension Brand Name:Showa®
- SysModelID:106860
- MfrModelID:KX450KMFNN
- Year:2021
- Manufacturer:Kawasaki
- Model Name:KX™
- Trim Name:450X
- Family Name:KX™
- Product Type:Motorcycle / Scooter
- Manufacturer Type:Motocross
- Generic Type (Primary):Off-Road
- Manufacturer Country:Japan
- Photo Name:2021_Kawasaki_KX_450XC.jpg
- Major Revision Year:2021
- Revision Status:New
- Competitor Code:MOT21OAI000
- Introduction Year:2021
- SysTrimId:330011
- SysMakeId:3
- Data Provider:CRS
- Parent Company:Kawasaki
- Display Name:KX™450X
- Engine Displacement to Weight (cc):1.93
- Currency:US Dollars
- Destination Charge:410
- Rear Suspension Type:Twin Sided Swing Arm
- Rear Travel (in):12.1
- Rear Travel (mm):307.3
- Rear Adjustable Shock / Spring Pre-Load:Yes
- Rear Adjustable Rebound Damping:Yes
- Number Rear Shock Absorbers:1
- Rear Suspension Brand Name:UNI-TRAK®
- Rear Suspension Material:Aluminum
- Seat Type:One-Piece
- Seat Material:Vinyl
- Seat Location:Driver
- Seat Height (in):37.6
- Seat Height (mm):955
- Number Of Seats:1
- Stand Type:Kick
- Steering Control:Handlebar
- Tire Brand:Dunlop®
- Front Tire Width:80
- Front Tire Aspect Ratio:100
- Front Tire Speed Rating:M
- Front Wheel Diameter:21
- Rear Tire Width:120
- Rear Tire Aspect Ratio:90
- Rear Tire Speed Rating:M
- Rear Wheel Diameter:18
- Front Tire (Full Spec):Dunlop® Geomax AT18F: 80/100-21 51M
- Rear Tire (Full Spec):Dunlop® Geomax AT18 120/90-18 65M
- Wheels Composition:Aluminum
- Tube / Tubeless:Tubed
- Front Wheel Width (in):1.6
- Rear Wheel Width (in):2.15