The Yamaha WR450F motorcycle was produced from 2017-18 and features a four-stroke, single-cylinder, DOHC engine with 4 titanium valves and a capacity of 449cc. The liquid-cooled engine has a compression ratio of 12.5:1 and is lubricated with dry sump oil. The bike has a 44mm Keihin (R) fuel injection induction system and is started with an electric ignition.
With a wet, multi-disc clutch and a 5-speed transmission with a wide-ratio constant-mesh final drive, this motorcycle has a primary ratio of 2.609 (60/23) and a secondary ratio of 3.846 (50/13). The front suspension is a 48mm Kayaba spring-type fork with speed-sensitive damping and is fully adjustable. The rear suspension is a swingarm, link suspension, mono shock, Kayaba single shock that is also fully adjustable.
The bike’s front brakes feature a single hydraulic single 270mm disc and a 4-piston caliper, while the rear brakes feature a single 245mm disc and a 2-piston caliper. The bike has aluminum alloy wheels with laced spokes and a front tire size of 80/100-21 and a rear tire size of 120/90-18. The motorcycle has a rake of 26.3 degrees, a trail of 115mm / 4.5 in, and a ground clearance of 325mm / 12.8 in. The bike has a wet weight of 123kg / 271lbs and a fuel capacity of 7.5 liters / 2.0 US gal.
Technical specifications:
Make Model: Yamaha WR450F
| Year | 2017 – 18 |
|---|---|
| Engine | Four stroke, Single cylinder, DOHC, 4 titanium valves |
| Capacity | 449 cc / 27.4 cu in |
| Bore x Stroke | 97.0 x 60.8mm |
| Cooling System | Liquid cooled |
| Compression Ratio | 12.5:1 |
| Lubrication | Dry sump |
| Oil Capacity | 1.2 L / 2.5 US pt |
| Exhaust | Single, upswept, under seat |
| Induction | 44mm Keihin (R) fuel injection |
| Ignition | TCI: Transistor Controlled Ignition |
| Starting | Electric |
| Max Power | NA |
| Max Torque | NA |
| Clutch | Wet, multi-disc, |
| Transmission | 5-Speed, Wide-ratio constant-mesh |
| Final Drive | O-ring chain |
| Primary Ratio | 2.609 (60/23) |
| Secondary Ratio | 3.846 (50/13) |
| Gear Ratio | 1st 2.417 (29/12) 2nd 1.733 (26/15) 3rd 1.313 (21/16) 4th 1.050 (21/20) 5th 0.840 (21/25) |
| Frame | Aluminium bilateral beam |
| Front Suspension | 48mm Kayaba spring-type fork with speed sensitive, damping; fully adjustable |
| Front Wheel Travel | 310 mm / 12.2 in |
| Rear Suspension | Swingarm, link suspension, mono shock, Kayaba single shock; fully adjustable |
| Rear Wheel Travel | 310 mm / 12.2 in |
| Front Brakes | Single hydraulic single 270 mm disc 4 piston caliper |
| Rear Brakes | Single 245 mm disc 2 piston caliper |
| Wheels | Aluminium alloy, laced spokes |
| Front Tyre | 80/100-21 |
| Rear Tyre | 120/90-18 |
| Rake | 26.3 degrees |
| Trail | 115 mm / 4.5 in |
| Dimensions | Length: 2165 mm / 85.2 in Width: 825 mm / 32.5 in Height: 1280 mm / 50.4 in |
| Wheelbase | 1465 mm / 57.7 in |
| Seat Height | 965 mm / 38. in |
| Ground Clearance | 325 mm / 12.8 in |
| Wet Weight | 123 kg / 271 lbs |
| Fuel Capacity | 7.5 Litres / 2.0 US gal |
