The pinnacle of reliable performance dual purpose bikes, designed to continue the adventure when the road stops and the trail begins.
High-Tech Four-Stroke Powerplant
250cc liquid-cooled, DOHC engine with two titanium intake valves and two steel exhausts, forged piston and direct-plated cylinder for outstanding durability.
Advanced, High-Revving Cylinder Design
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 for more responsive power.
Durable Engine Internals
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, improving durability and reducing friction losses.
Three-axis engine layout keeps the engine compact. The wet oil sump tucks between frame rails to keep the engine height down and minimize overall chassis size.
Rare earth-type ACM alternator keeps the weight down while providing the current needed to run the FI and lighting systems.
Direct ignition coil sits atop the spark plug, for a high-energy spark and reduced weight compared to conventional coils and high voltage spark plug wires—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.
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 Forks
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 large 14mm rod and 46mm cylinder for excellent damping and fade resistance.
Dual Wave-Type Disc Brakes
Wave brake rotors front and rear, including a large 250mm front disc, reduce unsprung weight and provide excellent performance. And the rear brake pedal is forged aluminum for durability.
Narrow, Rider-Focused Ergonomics
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 and improved connection to the machine.
WR enduro-style instrument panel provides excellent visibility in spite of the compact size. Basic mode provides speed, clock, trip meter and self-diagnostic function, while a measurement mode includes a stopwatch and distance-compensating trip meter.
Minimalist front and rear fenders are designed for function, simplicity, and lightness. Bodywork with a separate radiator heat outlet helps keep engine and rider cool.
Lightweight headlight and LED taillight maximize visibility and draw less current.