Yamaha Unveils the ALL-NEW Fuel Injected WR250X Supermoto machine
Some of us have seen spy photos of this bike but we never thought it would make it to America. This is a first for Yamaha, a race inspired street-legal supermoto bike, Fuel injection to boot. This bike will be available in two different configurations, the supermoto X version with 17 wheels and a full dual sport version R with 21/18 inch wheels. The X will retail for $5,999.00 and is scheduled to be available January 2008.
ALL-NEW FOR 2008:
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 showertype
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 strongaccelerating
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.
WR250X
250cc liquid-cooled DOHC 4-stroke;
4 valves
77.0 x 53.6mm
11.8:1
Fuel injection
Direct ignition coil
Constant-mesh 6-speed;
multiplate wet clutch
Inverted fork; fully adjustable,
10.6-in travel
Single shock; fully adjustable,
10.4-in travel
Hydraulic single-disc brake, 298mm
Hydraulic single-disc brake, 230mm
110/70-17
140/70-17
83.1 x 31.9 x 46.9 in
35.2 in
56.1 in
10.2 in
2.0 gal
280 lb (CA 282 lb)
Team Yamaha Blue/White
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.
AVAILABLE ACCESSORIES:
Please refer to the Yamaha Accessories & Apparel
Brochure or go to yamaha-motor.com.
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