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
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
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
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
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
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
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.
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 36.6 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.