Friday, December 24, 2010


YFZ 450
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.

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.
  • 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.
  • 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.
Type449cc liquid-cooled w/fan, 4-stroke; DOHC, 5 titanium valves
Bore x Stroke95.0mm x 63.4mm
Compression Ratio11.4:1
CarburetionKeihin 39mm FCR w/throttle position sensor
IgnitionDC - CDI
Starting SystemElectric
Transmission5-speed; wet multiplate clutch
Drive Train2WD; sealed O-ring chain, eccentric adjustment
Suspension/FrontIndependent double wishbone, w/piggy back High-/Lo-speed compression, rebound and threaded preload adjustment, 9.1-in travel
Suspension/RearCast aluminum swing arm w/rebound, High-/Lo-speed compression and threaded preload, 10.6-in travel
Brakes/FrontDual ventilated hydraulic disc, twin piston
Brakes/RearVentilated hydraulic disc, twin piston
Tires/FrontAT21 x 7-10 radial
Tires/RearAT20 x 10-9 radial
L x W x H72.4 x 46.1 x 42.9 in
Seat Height31.9 in
Wheelbase50.4 in
Ground Clearance4.5 in
Fuel Capacity2.6 gal
Dry Weight350 lb
LightingDual 30W Krypton multi-reflector headlights & 3.9/0.5W LED brakelight
Warranty6 Month (Limited Factory Warranty)


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