Yamaha WR250F

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.[3] 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.

Yamaha WR250F
ManufacturerYamaha Motor Company
ClassOff road, Enduro
Engine246 cc (15.0 cu in) Single-cylinder; four-stroke, liquid-cooled, DOHC, 5 titanium valves
Bore / stroke77.0 mm × 53.6 mm (3.03 in × 2.11 in)
Compression ratio12.5:1
Ignition typeCDI
TransmissionConstant-mesh 6-speed; multiplate wet clutch, chain drive[1]
SuspensionFront: Inverted telescopic fork; fully adjustable, 11.8 in (300 mm) travel
Rear: single shock; fully adjustable, 12.2 in (310 mm) travel
BrakesFront: hydraulic single disc brake, 250 mm
Rear: hydraulic single disc brake, 245 mm
TiresFront: 80/100-21 51M
Rear: 100/100-18-59M
Wheelbase58.3 in (1,480 mm)
DimensionsL: 85.2 in (2,160 mm)
W: 32.5 in (830 mm)
H: 51.1 in (1,300 mm)
Seat height38.6 in (980 mm)
Weight256 lb (116 kg) (claimed)[2] (wet)
Fuel capacity2.1 US gal (7.9 l; 1.7 imp gal)
Fuel consumption71 mpg‑US (3.3 L/100 km; 85 mpg‑imp)
RelatedYamaha YZ250F

Yamaha WR450F

Yamaha WR250R

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

Significant advances
2003Automatic decompression exhaust cam and electric starting
2006Digital display
2007Aluminium frame
2015Bilateral beam frame, 6-speed transmission, Rear slant cylinder, KYB SSS Forks, and Fuel Injection[1]
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See also


References
  1. Dension, Chris; Booth, Adam (12 December 2014). "First Impression: 2015 Yamaha WR250F". Dirt Rider. Retrieved 7 May 2019.
  2. Official website
  3. http://www.totalmotorcycle.com/photos/2008models/2008models-Yamaha-WR250F.htm Total motorcycle.com 2008 Yamaha WR250F
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