Yamaha WR250F

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Yamaha WR250F
Manufacturer Yamaha Motor Company
Class Off road, Enduro
Engine 246 cc (15.0 cu in) Single-cylinder; four-stroke, liquid-cooled, DOHC, 5 titanium valves
Bore / stroke 77.0 mm × 53.6 mm (3.03 in × 2.11 in)
Compression ratio 12.5:1
Ignition type CDI
Transmission Constant-mesh 5-speed; multiplate wet clutch, chain drive

Front: Inverted telescopic fork; fully adjustable, 11.8 in (300 mm) travel

Rear: single shock; fully adjustable, 12.2 in (310 mm) travel
Brakes Front: hydraulic single disc brake, 250 mm
Rear: hydraulic single disc brake, 45 mm
Tires Front: 80/100-21 51M
Rear: 100/100-18-59M
Wheelbase 58.3 in (1,480 mm)
Dimensions L: 85.2 in (2,160 mm)
W: 32.5 in (830 mm)
H: 51.1 in (1,300 mm)
Seat height 38.6 in (980 mm)
Weight 256 lb (116 kg) (claimed)[1] (wet)
Fuel capacity 2.1 US gal (7.9 l; 1.7 imp gal)
Fuel consumption 71 mpg‑US (3.3 L/100 km; 85 mpg‑imp)[citation needed]

Yamaha YZ250F Yamaha WR450F

Yamaha WR250R

The Yamaha WR250F is an off-road motorcycle made by Yamaha Motor Company. It has a 250 cc (15 cu in) liquid-cooled single nikasil coated cylinder engine. First offered in 2001, it shared many components and design concepts with the YZ250F motocross model. It is basically the YZ250F detuned slightly for more controllable power, with a headlight and lighting coil, softer suspension, a kickstand, lower noise specifications, larger radiators, and lower emissions.[2] The WR in the name indicates a wide-ratio gear box common to most enduro or trail bikes and stands in contrast to the close-ratio gearbox essential to a motocross racer. Over the years the WR250F has benefited from the advances made in the YZ motocross version gaining advancements such as an aluminum frame and improved suspension.

Significant advances[edit]

2003 Automatic decompression exhaust cam and electric starting
2006 Digital display
2007 Aluminium frame
2014 Rear slant cylinder, Fuel Injection

See also[edit]