0 The YAMAHA YFZ450

Ultimate race-ready 450-class Sport ATV!

The reigning, multi-time GNCC Championship winner and ATV Illustrated's 2007 sprt ATV of the Year returns more race-ready than ever.

FEATURES

Key Features:

The lightest, most powerful ATV ever, winner of just about every magazine shootout, 2004/2006 GNCC and Quadcross Championships, 2005/2006 World Four-Stroke Champion and ATV Illustrated’s 2007 Sport ATV of the Year (a tie with our own Raptor 700R). Most powerful, industry-exclusive, five-titanium-valve engine and 350-pound dry weight give the YFZ450 the best power-to-weight ratio of any ATV ever produced. Ultra-compact, lightweight, high-tensile steel frame with fully adjustable suspension means YFZ450 is also the best handling race-bred ATV ever produced. The YFZ450 comes standard with pushbutton electric starting, a convenient flip-type parking brake and suspension calibrated for performance.

Engine:

449cc liquid-cooled, DOHC four-stroke with five titanium valves features 95mm bore and 63.4mm stroke for massive power with high over-rev capacity and crisp, linear throttle response. Large-capacity radiator is optimally mounted in the frame to guard against damage. Reliable, pushbutton electric start in any gear adds extra convenience. High-performance 39mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS) delivers ultra-precise fuel/air mixing and crisp throttle response. Additional weight-saving engine features include: magnesium cylinder head cover and right-side crankcase cover; small-design cam chain tensioner and oil pump; aluminum oil hose; and light CDI ignition unit. Trick, works-style clutch lever features oversize barrel adjuster for easy, no-tool adjustability of lever/cable play. Dry-sump engine carries oil in an aluminum tank directly in front of the engine for excellent cooling and optimal protection from rocks or mud. DC ignition system delivers ultra-precise spark and 3D timing for faster, stronger engine response during hard acceleration. High-performance stainless steel exhaust header is mated to a USFS-approved spark arrestor. Smooth-shifting YZ-spec ratchet-type five-speed transmission and heavy-duty clutch deliver all that power to the rear tires with maximum efficiency. Large capacity airbox features no-tool access to the oiled dual foam filter for easy maintenance. Ignition coil is integrated into the spark plug cap; extremely light and compact.

Chassis/Suspension:

Independent aluminum upper A-arm front suspension features competition-spec piggyback shocks with 9.1 inches of travel and adjustable preload, rebound and high- and low-speed compression damping. Rear suspension system is YZ linkage-type, controlled by a fully adjustable Showa shock with 10.6 inches of travel with adjustable preload, rebound and high- and low-speed compression damping. Ultra-rigid cast aluminum swingarm reduces weight and ensures optimal suspension action. Titanium heat shield is super light and strong. Long travel out back means an excellent ride and handling. Eccentric chain adjuster mechanism simplifies that job, and a twin-piston rear brake caliper provides strong, controllable rear braking. Numerous aluminum components—including the swingarm, upper A-arms, oil tank, grab bars and wheels—help keep overall dry weight down to a paltry 350 pounds. Controlled Fill cast aluminum subframe is light and super-strong. Lightweight front and rear master cylinders, combined with twin 161mm front discs with twin-piston calipers and single 200mm rear disc, deliver incredible stopping power with progressive control and feel. High-performance 21x7R-10 front and 20x10R-9 rear Dunlop radials, designed specifically for the YFZ450, deliver superb, class-leading traction. Long, low and narrow YZ-style seat enhances the quick, balanced steering and optimal rider movement.

Additional Features:

Rugged 45mm-wide serrated footrests provide excellent grip and rider comfort. ProTaper aluminum handlebar is light, strong and comfortable. Large-capacity, 2.6 gallon fuel tank ensures excellent range. Dual 30-watt multi-reflector Krypton headlights set back in the front cowl add the perfect menacing appearance. LED taillight is tough, draws less current and has an incorporated brake light for added convenience. Easy-to-use, toggle link-type handlebar-mounted parking brake can be set with one hand.

STATISTICS

Engine
Type	449cc liquid-cooled w/fan, 4-stroke; DOHC, 5 titanium valves
Bore x Stroke	95.0mm x 63.4mm
Compression Ratio	11.4:1
Carburetion	Keihin 39mm FCR w/throttle position sensor
Ignition	DC - CDI
Starting System	Electric
Transmission	5-speed; wet multiplate clutch
Drive Train	2WD; sealed O-ring chain, eccentric adjustment
Chassis
Suspension/Front	Independent double wishbone, w/piggy back High-/Lo-speed compression, rebound and threaded preload adjustment, 9.1-in travel
Suspension/Rear	Cast aluminum swing arm w/rebound, High-/Lo-speed compression and threaded preload, 10.6-in travel
Brakes/Front	Dual ventilated hydraulic disc, twin piston
Brakes/Rear	Ventilated hydraulic disc, twin piston
Tires/Front	AT21 x 7-10 radial
Tires/Rear	AT20 x 10-9 radial
Dimensions
L x W x H	72.4 x 46.1 x 42.9 in
Seat Height	31.9 in
Wheelbase	50.4 in
Ground Clearance	4.5 in
Fuel Capacity	2.6 gal
Dry Weight	350 lb
Other
Lighting	Dual 30W Krypton multi-reflector headlights & 3.9/0.5W LED brakelight
Warranty	6 Month (Limited Factory Warranty)