2007 YAMAHA WRs

2007 YAMAHA WRs

WR450

Key Features:

    * A YZ-bred advanced aluminum frame?carefully engineered from castings, forgings and extrusions?enhances handling while retaining legendary Yamaha feel and characteristics.
    * Now there?s even more controllable power flowing from the five-titanium-valve, 11,000 rpm engine?and it starts with the push of a button.
    * Cool, digital enduro computer offers speedometer, clock, tripmeter, etc. in basic mode ? or pace management functions such as timer, distance-compensating tripmeter, average speed, etc. when switched to race mode.
    * California green sticker compliant.

Engine:

    * 449cc liquid-cooled, DOHC four-stroke with titanium valves delivers more broad power than ever, with high over-rev capacity and crisp, linear throttle response.
    * Changing the cylinder mounting angle to a more vertical position in the new frame provides excellent overall machine balance.
    * Revised camshafts, carburetion, intake ports, exhaust, etc., all work together to produce an engine with even more low- and mid-range power.
    * New crank with revised balance factor and new AC generator provides super-smooth running. Strong new connecting rod and piston oil-jet for increased cooling and long life.
    * New, dry sump lubrication system carries the oil reservoir inside the engine cases, for excellent mass centralization and simplified plumbing.
    * 39mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS) produces ultra-precise fuel/air mixing and lightning-quick throttle response.
    * New “no tools” airbox adopts hinge-type quick-open lid. Battery rides 8mm lower than before for improved handling.
    * Digital CDI ignition system delivers more precise spark and monitors engine speed to ensure optimal timing for fast, strong response during hard acceleration.
    * New, bigger radiators with reinforcements ensure maximum cooling efficiency with greater 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 and allows hassle-free replacement of oil filter.
    * 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 ensures easy restarts.

Chassis/Suspension:

    * All-new YZ-inspired aluminum frame helps reduce weight while optimizing mass centralization. An extensively tested assembly of aluminum forgings, castings and extrusions. The new WR frame retains legendary Yamaha handling and response.
    * Removable aluminum rear subframe constructed of square-section tube for reduced weight.
    * Fully adjustable air/oil-separate 48mm fork tubes deliver precise, fade-free handling; fork protectors provide excellent tube coverage.
    * Tapered swingarm adopts YZ-style linkage for controlled, compliant rear suspension action. Revised axle and holders reduce weight in a critical area.
    * The Kayaba shock provides 12.0 inches of travel with adjusters for high- and low-speed compression damping, rebound and spring preload?and features a larger piggyback reservoir for excellent damping and fade resistance.
    * New, wave disc brake rotors front and rear 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.
    * Premium Dunlops offer unbeatable, competition-spec traction and excellent wear.

Additional Features:

    * Cool new YZ-derived bodywork, new engine covers and a thick new seat look great and feel excellent on long rides.
    * New ProTaper aluminum handlebar and new forged triple clamp shaves weight and provides easier, lighter cornering.
    * Slim design lightweight fuel tank holds 2.1 gallons.
    * One-piece, high strength, plastic skid plate shaves weight and offers great protection.
    * Lightweight headlight and sweet LED taillight maximize visibility and draw less current.
    * Adjustable front brake lever.
    * Wide footpegs are also lower for more comfort.
    * Repackable aluminum muffler.
    * Front wheel collar makes front wheel removal quick and easy.

WR250

Key Features:

    * A YZ-bred advanced aluminum frame?carefully engineered from castings, forgings and extrusions?enhances handling while retaining legendary Yamaha feel and characteristics.
    * Now there?s even more controllable power flowing from the high-revving five-titanium-valve engine?and it starts with the push of a button.
    * Cool, digital enduro computer offers speedometer, clock, tripmeter, etc., in basic mode?or pace management functions such as timer, distance-compensating tripmeter, average speed, etc., when switched to race mode.
    * California green sticker compliant.

Engine:

    * 249cc liquid-cooled, DOHC four-stroke with 5 titanium valves delivers more low- and mid-range power than ever, with high over-rev capacity and crisp, linear throttle response.
    * Revised camshafts, carburetion and TPS tuning, new exhaust and ignition systems work together to produce a quick-revving engine with even more low- and mid-range power.
    * 37mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS) ensures ultra-precise fuel/air mixing and lightning-quick throttle response.
    * Revised transmission ratios in the five-speed gearbox-wider in 1st through 3rd, and closer in 4th and 5th.

Chassis/Suspension:

    * All-new YZ-inspired aluminum frame helps reduce weight while optimizing mass centralization. An extensively tested assembly of aluminum forgings, castings and extrusions. The new WR frame retains legendary Yamaha handling and response.
    * Removable aluminum rear subframe constructed of square-section tube for reduced weight.
    * Fully adjustable air/oil-separate 48mm fork tubes deliver precise, fade-free handling; fork protectors provide excellent tube protection.
    * Tapered swingarm adopts YZ-style linkage for controlled, compliant rear suspension action. Revised axle and holders reduce weight in a critical area.
    * The Kayaba shock provides 12.0 inches of travel with adjusters for high- and low-speed compression damping, rebound and spring preload?and features a larger piggyback reservoir for excellent damping and fade resistance.
    * New, wave disc brake rotors front and rear 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 wheels provide exceptional durability and reduced unsprung weight for optimal suspension performance.
    * Premium Dunlops offer unbeatable, competition-spec traction and excellent wear.

Additional Features:

    * YZ-derived bodywork, new engine covers and a thick new seat look great and feel excellent on long rides.
    * ProTaper aluminum handlebar in forged triple clamp shaves weight and increases comfort.
    * Wide footpegs are also lower for more comfort.
    * Slim design lightweight fuel tank holds 2.1 gallons.
    * One-piece, high strength, plastic skid plate shaves weight and offers great protection.
    * Lightweight headlight and sweet LED taillight maximize visibility and draw less current.
    * Adjustable front brake lever.
    * Repackable aluminum muffler.
    * Front wheel collar makes front wheel removal quick and easy.