Yamaha WR450F (2017-18)

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

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