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Key Features:

ALL-NEW FOR 2008

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.

Engine:

Fresh-sheet design 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.

Chassis/Suspension:

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.

Engine
Type	250cc liquid-cooled DOHC 4-stroke;4 valves
Bore x Stroke	77.0 x 53.6mm
Compression Ratio	11.8:1
Carburetion	Fuel injection
Ignition	Direct ignition coil
Transmission	Constant-mesh 6-speed; multiplate wet clutch
Final Drive	Chain
Chassis
Suspension/Front	Inverted fork; fully adjustable, 10.6-in travel
Suspension/Rear	Single shock; fully adjustable, 10.4-in travel
Brakes/Front	Hydraulic single-disc brake, 298mm
Brakes/Rear	Hydraulic single-disc brake, 230mm
Tires/Front	110/70-17
Tires/Rear	140/70-17
Dimensions
Length	83.1 in
Width	31.9 in
Height	46.9 in
Seat Height	35.2 in
Wheelbase	56.1 in
Ground Clearance	10.2 in
Fuel Capacity	2.0 gal
Dry Weight	280 lb (CA 282 lb)
Other
Warranty	1 Year (Limited Factory Warranty)