2014 Yamaha Wr450f Dirt Bike

YZ250F-inspired frame makes for a compact size while optimizing mass centralization.

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Engine
Type	449cc liquid-cooled DOHC 4-stroke; 5 titanium valves
Bore x Stroke	95.0mm x 63.4mm
Compression Ratio	12.3:1
Fuel Delivery	Fuel Injection
Ignition	TCI
Transmission	Constant-mesh 5-speed; multiplate wet clutch
Final Drive	Chain Drive
Chassis
Suspension / Front	Inverted fork; fully adjustable; 11.8-in travel
Suspension / Rear	Single shock; fully adjustable, 11.6-in travel
Brakes / Front	Hydraulic single disc brake
Brakes / Rear	Hydraulic single disc brake
Tires / Front	80/100-21M
Tires / Rear	120/90-18M
Dimensions
Length	85.0 in
Width	32.5 in
Height	50.2 in
Seat Height	37.8 in
Wheelbase	57.7 in
Ground Clearance	13.2 in
Fuel Capacity	2.1 gal
Wet Weight***	273 lb

Engine:

449cc liquid-cooled DOHC four-stroke with five titanium valves delivers more broad power than ever, with high over-rev capacity and crisp, linear throttle response.
Fuel injection system delivers quick throttle response and smooth power delivery at nearly all altitudes and temperatures.
Special crank balance factor and AC generator provide super-smooth running. A piston oil-jet provides increased cooling for long life.
Dry-sump lubrication system carries the oil reservoir inside the engine cases, for excellent mass centralization and simplified plumbing.
Digital TCI ignition system delivers precise spark and monitors engine speed to provide optimal timing for fast, strong response during hard acceleration.
Large-capacity radiators with reinforcements provide maximum cooling efficiency with great strength.
Wide-ratio five-speed transmission uses strengthened gears and YZ450F-spec multiplate clutch—good for quick-hitting power in the woods, as well as eye-opening top-end power.
Lightweight exhaust system maximizes engine power.
Aluminum muffler with USFS-approved spark arrestor looks trick and keeps things light.
Works-style clutch lever features oversize barrel adjuster for easy, on-the-fly adjustability of lever/cable play.
Electric start provides easy restarts.

YZ250F-inspired frame makes for a compact size while optimizing mass centralization. With its extensively tested assembly of aluminum forgings and extrusions, the WR frame retains legendary Yamaha handling and response.
Compact YZ250F-based chassis provides a lightweight feeling with plush suspension performance for the most demanding rider.
Removable aluminum rear subframe is constructed of square-section tube.
Fully adjustable YZ-based KYB® air/oil-separate 48mm cartridge-type fork delivers precise, fade-free handling; fork protectors provide excellent tube protection.
Tapered swingarm adopts YZ-style linkage for controlled, compliant rear suspension action. Lightweight axle and holders reduce weight in a critical area.
The KYB® shock provides 11.6 inches of travel with adjusters for high- and low-speed compression damping, rebound and spring preload—and features a large piggyback reservoir for excellent damping and fade resistance.
Wave-style brake discs reduce unsprung weight and provide excellent performance. Front and rear calipers with aluminum pistons deliver strong stopping power with progressive feel.
Lightweight 21-inch front and 18-inch rear Excel® rims provide exceptional durability and help reduce unsprung weight for optimal suspension performance.
Repackable aluminum muffler shaves weight.
Premium Dunlop® knobbies offer unbeatable, competition-spec traction and excellent wear.

Cool YZ-derived bodywork and a thick seat look great and feel excellent on long rides. Tapered aluminum handlebar in forged triple clamp for light weight and great comfort.
All this, including: tool-less access air box, Excel® rims, 18” rear wheel, tapered aluminum handlebars, wave-type brake rotors, electric start, on-the-fly clutch adjuster, O-ring chain and aluminum side stand. This machine is ready for tight trails, woods, or desert fun.
Slim-design lightweight fuel tank holds 2.1 gallons.
One-piece, high-strength, plastic skidplate shaves weight and offers great protection.
Lightweight, 35-watt headlight and sweet LED taillight maximize visibility and draw less current.
Adjustable front brake lever.
Ultra-wide footpegs for more comfort.
Repackable aluminum muffler shaves weight.
Wheel collars make wheel removal quick and easy.