Yamaha WR250F

Yamaha WR250F
	2002 Yamaha WR250F with modifications for on-road use
Manufacturer	Yamaha Motor Company
Production	2001 – present
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 6-speed; multiplate wet clutch, chain drive
Suspension	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, 245 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) (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)
Related	Yamaha YZ250F ; Yamaha WR450F

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, lighting coil, softer suspension, a kickstand, better noise specifications, larger radiators, and lower emissions. The WR250F is basically a YZ250F modified for enduro competitions, extreme enduro competitions and hard enduro competitions and the practice of these extreme sports. 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 YZF motocross version, gaining advancements such as an aluminum frame and improved suspension.

Despite the similar name, it shares very few common components with the heavier, street-legal dual sport WR250R or its supermoto variant WR250X.

Significant advances

2003	Automatic decompression exhaust cam and electric starter
2006	Digital display
2007	Aluminium frame
2015	Bilateral beam frame, 6-speed transmission, Rear slant cylinder, KYB SSS Forks, and Fuel Injection