Yamaha WR tech info
Yamaha WR description
2014 Yamaha WR250R, BRAND NEW 2014 - Directly descended from our YZ motocrossers and WR off-road machines, the WR250R is here to make Yamaha’s off-road prowess street accessible. Not exactly an enduro model and not a streetbike either, the WR250R is for riders who ride off-road more than on. 250cc liquid-cooled, DOHC engine with two titanium intake valves and two steel exhausts, forged piston and plated cylinder for outstanding durability. Pentroof combustion chamber with downdraft-type straight intake helps make excellent power across the rev band, with maximum power at 10,000 rpm. First use of fuel injection on a 250 Yamaha on/off-road bike. The system relies on input from a crank sensor, intake air pressure sensor and throttle position sensor feeding a compact ECU to provide optimum combustion. An ECU-controlled EXUP exhaust valve, along with an electronic intake control valve, broadens the powerband. High lift cams have WPC surface treatment in which the surface is sprayed with fine powder at over 100 meters per second to increase surface hardness. Three-axis engine layout keeps the engine compact. Wet sump tucks between frame rails to keep the engine height down. Rare earth-type ACM alternator keeps the weight down while providing all the current needed to run the FI and lighting systems. Direct ignition coil sits atop the spark plug—another first on a Yamaha on-off road model. Six-speed gearbox provides a wide spread of ratios, with shower-type lubrication for reliability. A special light-action clutch makes shifting a snap. Tucked-in, three-chamber muffler helps keep mass centralized and the bike quiet. Electric start only: Leaving off the kickstarter keeps it light and simple YZ / WR250-inspired semi-double-cradle frame uses a main frame of cast and forged aluminum sections, with high-strength steel downtubes for excellent strength and rigidity characteristics. Asymmetrical swingarm provides excellent strength/rigidity balance and a dynamic look. Cast aluminum crossmembers, extruded arms and a 22mm rear axle are carefully tuned for optimum handling. Fully adjustable 46mm fork provides 10.6 inches of wheel travel. A forged lower triple clamp and a cast upper one help give outstanding front-end feel. An aluminum steering stem reduces weight. Linkage-mounted rear shock provides 10.6 inches of travel with adjusters for compression damping, rebound damping and spring preload—and features a 14mm rod and 46mm cylinder for excellent damping and fade resistance. Wave brake rotors front and rear, including a large 250mm front disc, reduce unsprung weight and provide excellent performance. Rear pedal is forged aluminum. Additional Features: A slim, steel fuel tank is shaped with knee grip in mind, and the entire ergonomic layout is designed to make the rider feel like part of the bike.
Yamaha WR for Sale
- 2011 yamaha wr450f dirt bike (US $5,999.00)
- 2014 yamaha wr450f (US $8,290.00)
- 2008 yamaha wr250r dual sport (US $4,200.00)
- 2012 yamaha wr250r dual sport (US $5,695.00)
- 2012 yamaha wr450f dirt bike (US $6,199.00)
- 2006 yamaha wr250f dirt bike (US $3,495.00)
Moto blog
2024 Yamaha Tracer 9 GT+ Review
Thu, 17 Aug 2023Riding 950 miles across three states in two days highlights this Tracer’s capabilities Photography by Joseph Augustin New motorcycle model introductions follow a well-worn path: travel to the event location, eat nice meals, get briefed on the bike of the moment, ride a route designed to highlight the bike’s strengths, take photos/video, eat more good food, return home, and write up a review. After 27 years in this industry, I still get a cheap thrill about throwing a leg over a new motorcycle before it is available to the general public. However, what really gets me going is when I have a chance to log more than just the couple of hundred miles typically covered in an intro and spend some real time on the road with said bike.
Yamaha To Host A Full Slate Of Activities During Laguna Seca MotoGP Weekend July 19-21
Wed, 10 Jul 2013If you’re going to be at the Red Bull U.S. Grand Prix at Mazda Raceway Laguna Seca, July 19-21, be sure to stop by the Yamaha Marketplace, located between turns 5 and 6, as this will be the eighth consecutive year Yamaha and the raceway have worked together to bring race fans entertainment throughout the weekend. Here’s a breakdown of the weekend’s events.
Yamaha Named Official Motorcycle Of Road America
Thu, 02 May 2013The economic downturn hit the motorcycle world particularly hard, as many factory-backed road racing efforts closed shop. The decision, while unfortunate, isn’t hard to understand, as racing at the highest levels isn’t cheap, and a factory involvement means added pressure to succeed, which ultimately means spending more money to do so. Through it all, however, Yamaha has remained involved with the sport, fielding factory teams and sponsoring various riding schools and even racetracks.
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