Comparison of Kawasaki KX450 2021 and Yamaha YZ450F 60th Anniversary [S]ave
| Attribute |  Yamaha YZ450F 60th Anniversary × |  Kawasaki KX450 2021 × |
|---|---|---|
| General | ||
| Production from (year) | 2016 | 2021 |
| Make | Yamaha | Kawasaki |
| Model | Yamaha YZ450F 60th Anniversary | Kawasaki KX450 |
| Category | Cross / motocross | Cross / motocross |
| Engine and transmission | ||
| Engine type | Single cylinder, four-stroke | Single cylinder, four-stroke |
| Valves per cylinder | 4 | - |
| Fuel system | Injection. Yamaha Fuel Injection (YFI), Keihin 44mm | Injection. DFI® with 44mm Keihin throttle body |
| Engine details | Titanium valves | - |
| Displacement (cm³) | 449.7 | 449 |
| Cooling system | Liquid | Liquid |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 97 | 96 |
| Stroke (mm) | 60.8 | 62 |
| Gearbox | 5-speed | 5-speed |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) | Double Overhead Cams/Twin Cam (DOHC) |
| Ignition | TCI: Transistor Controlled Ignition | Digital CDI with 3 Coupler Options |
| Clutch | Wet multi-disc | Wet multi-disc, manual |
| Lubrication system | Wet sump | - |
| Compression | 12.5:1 | 12.5:1 |
| Exhaust system | Titanium Akrapovic muffler | - |
| Chassis | ||
| Front suspension | Upside-down telescopic fork | 49mm inverted telescopic coil-spring fork with 16-way compression damping and 16-way rebound damping |
| Rear suspension | Monoshock, adjustable preload and rebound damping | Uni-Trak® gas charged shock with piggyback reservoir with dual-range (4 turns stepless high speed/19-way low-speed) compression damping |
| Front brakes | Single disc. Hydraulic. | Single disc. Semi-floating petal discs |
| Rear brakes | Single disc. Hydraulic. | Single disc. Single-piston caliper. |
| Diameter (mm) | 245 | 250 |
| Frame type | Aluminum Bilateral Beam frame | Aluminum perimeter |
| Front tyre | 80/100-21 | 80/100-21 |
| Rear tyre | 120/80-19 | 120/80-19 |
| Seat | Long, two-tone, motocross-style seat | - |
| Front wheel travel (mm) | 310 | 305 |
| Rear wheel travel (mm) | 315 | 307 |
| Trail (mm) | 118 | 122 |
| Rake (fork angle) (degree) | 27.5 | 27.6 |
| Other | ||
| Starter | Kick | Electric |
| Color options |
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| Dimensions | ||
| Wheelbase (mm) | 1,481 | 1,485 |
| Kerb weight (kg) | 112 | 110 |
| Dry weight (kg) | - | 105 |
| Overall height (mm) | 1,290 | 1,265 |
| Overall length (mm) | 2,174 | 2,185 |
| Overall width (mm) | 826 | 820 |
| Seat height (mm) | 975 | 955 |
| Ground clearance (mm) | 335 | 340 |
| Performance | ||
| Fuel capacity (l) | 7.57 | 6.2 |
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