Wednesday, December 22, 2010

The YAMAHA WR250X Dual Sport Motorcycle

Yamaha WR250X - Dual Sport Motorcycle - Red Bluff Yamaha
The cure for the common commute
Years of experience building advanced street and dirt bikes come together in the WR250X. The power flows freely from its high-tech, fuel-injected DOHC engine. An hybrid aluminum and steel frame ties 17 inch wheels with sticky radial street tires together. Feel free to back it in. Estimated at 71 Miles per Gallon Fuel rating.

Key Features:
  • Directly descended from our YZ motocrossers and WR off-road machines—even the original Yamaha YA-1 of 1955—the all-new WR250X is here to make Yamaha’s off-road prowess street accessible.
  • Not exactly an enduro, a supermoto or a sportbike, the WR250X is for riders who ride mostly paved surfaces. Its sibling, the off-road inspired WR250R, is for riders who spend more time in the dirt.
  • The WR250X achieves fuel economy up to an estimated 71 mpg** with a fuel tank that holds 2 gallons of gas.
  • 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.
  • Large titanium intake valves have WPC coating, a 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. Special, light-action clutch makes shifting a snap.
  • Tucked-in, three-chamber muffler keeps the mass concentration up and the bike quiet.
  • Electric start only: Leaving off the kickstarter keeps it light and simple.
  • 17-inch wheels mount radial street rubber in 110 front and 140mm rear widths and help lower the seat approximately 1.4 inch compared to the WR250R.
  • One-tooth smaller rear sprocket (13/42) works with the smaller-diameter tires to bring out the WR250X’s strong-accelerating character.
  • Stiffer springs front and rear and street-oriented damping settings reduce pitch compared to the WR250R for excellent pavement performance.
  • YZ/WR250-inspired semi-double-cradle frame uses a main frame of cast and forged aluminum sections, with high-strength steel downtube 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 10.4 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, 298mm 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.
  • Narrow, YZ-inspired seat features gripper-type cover for great seat-of-the-pants feel. Seat height is 35.2 inches.
  • WR enduro-style instrument panel provides excellent visibility in spite of the compact size. Basic mode provides speed, clock, tripmeter and self-diagnostic function. Measurement mode includes stopwatch, distance-compensating tripmeter, etc.
  • Minimalist front and rear fenders are designed for function, simplicity and lightness.
  • Bodywork with separate radiator heat outlet helps keep engine and rider cool.
  • Lightweight headlight and LED taillight maximize visibility and draw less current.
  • Separate clutch cover means easier serviceability.
  • One-screw air filter serviceability.
  • Adjustable front brake lever.
Type250cc liquid-cooled DOHC 4-stroke;4 valves
Bore x Stroke77.0 x 53.6mm
Compression Ratio11.8:1
CarburetionFuel injection
IgnitionDirect ignition coil
TransmissionConstant-mesh 6-speed; multiplate wet clutch
Final DriveChain
Suspension/FrontInverted fork; fully adjustable, 10.6-in travel
Suspension/RearSingle shock; fully adjustable, 10.6-in travel
Brakes/FrontHydraulic single-disc brake, 298mm
Brakes/RearHydraulic single-disc brake, 230mm
Length83.1 in
Width31.9 in
Height46.9 in
Seat Height35.2 in
Wheelbase56.1 in
Ground Clearance10.2 in
Fuel Capacity2.0 gal
Fuel Economy**71 mpg
Wet Weight299 lb (CA 301 lb)
Warranty1 Year (Limited Factory Warranty)


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