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