Yamaha WR450F (2011-12)

The Yamaha WR450F motorcycle was produced between 2011 and 2012. It has a four-stroke, single-cylinder engine with a capacity of 449 cc and a compression ratio of 12.3:1. The bike has both electric and kick starting options, with a maximum power of 58 hp at 9000 rpm and a maximum torque of 5.0 kgf-m at 7500 rpm. The clutch is a wet, multi-disc type, and it has a 5-speed constant mesh transmission. The frame is made of aluminum bilateral beam, with a front suspension of a 48mm upside-down telescopic fork and a rear suspension of swingarm, link suspension, mono-shock with a rear wheel travel of 305 mm. It uses hydraulic brakes with a single 250mm disc 4 piston caliper at the front and a single 245mm disc 2 piston caliper at the rear. The wheels are made of aluminum alloy with laced spokes, with a front tyre size of 80/100-21 51P and a rear tyre size of 120/90-18 65P. The bike has a ground clearance of 335mm and seat height of 960 mm with dry weight of 112.5 kg and wet weight of 122 kg. It has a fuel capacity of 7.2 litres. Overall, the Yamaha WR450F has a powerful engine, good suspension, and reliable brakes making it a suitable choice for competitive off-road riding.

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Technical specifications:

Make Model: Yamaha WR450F

Year: 2011 – 12

Engine: Four stroke, Single cylinder, DOHC, 5 valves

Capacity: 449 cc / 27.4 cu in

Bore x Stroke: 95 x 63.4 mm

Cooling System: Liquid cooled

Compression Ratio: 12.3:1

Lubrication: Dry sump

Oil Capacity: 1.2 L / 2.5 US pt

Exhaust: Single, upswept, under seat

Induction: 39mm Keihin FCR flat-slide throttle position sensor

Ignition: CDI

Starting: Electric & kick

Max Power: 58 hp / 42.3 kW @ 9000 rpm

Max Torque: 5.0 kgf-m 36.2 ft-lb @ 7500 rpm

Clutch: Wet, multi-disc

Transmission: 5-Speed, constant mesh

Final Drive: Chain

Frame: Aluminium bilateral beam

Front Suspension: 48mm Upside down telescopic fork

Front Wheel Travel: 300 mm / 11.8 in

Rear Suspension: Swingarm, link suspension, mono shock

Rear Wheel Travel: 305 mm / 12.0 in

Front Brakes: Hydraulic single 250 mm disc 4 piston caliper

Rear Brakes: Single 245 mm disc 2 piston caliper

Wheels: Aluminium alloy, laced spokes

Front Tyre: 80/100-21 51P

Rear Tyre: 120/90-18 65P

Rake: 27 degrees

Trail: 115 mm / 4.5 in

Dimensions: Length: 2315 mm / 91.1 in Width: 825 mm / 32.5 in Height: 1275 mm / 50.2 in

Wheelbase: 1475 mm / 58.1 in

Ground Clearance: 335 mm / 13.2 in

Seat Height: 960 mm / 37.8 in

Dry Weight: 112.5 kg / 268 lbs

Wet Weight: 122 kg / 268 lbs

Fuel Capacity: 7.2 Litres / 1.9 US gal