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Yamaha Motorsports

Key Features:

The lightest, most powerful ATV ever, winner of just about every magazine shootout and 2004 GNCC and GNC Championships, is back and even more unstoppable than before.

  • In honor of our favorite multi-time GNCC Champion, the Bill Ballance Edition YFZ450 gets a front grab bar, side nerf bars and a special graphics package that includes his signature.
  • 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.
  • 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.
  • A longer steering stem, new handlebars, a thicker seat and longer-travel rear suspension make riding hard not all that hard at all.

New for 2006:

  • Even more performance: a larger, more powerful, 449cc engine, revised carburetion, head design and ignition timing produce even more of an excellent thing—and an increased-capacity radiator keeps it cool.
  • New, titanium heat shield is super light and strong.
  • New larger-capacity radiator is optimally mounted in the frame to guard against damage.
  • More comfort: a longer steering stem, new handlebars and a thicker seat make the YFZ450 nice to ride for a long time.
  • Longer travel out back means an excellent ride and handling.
  • Aluminum grab bars are light and strong.
  • New, eccentric chain adjuster mechanism simplifies that job, and a new, twin-piston rear brake caliper provides strong, controllable rear braking.
  • New tires provide excellent traction, handling and ride quality.
  • New LED taillight is bright, tough and draws less current.


  • Liquid-cooled, 449cc, five-valve, DOHC, four-stroke with titanium valves features 95mm bore and 63.4mm stroke for massive power with high over-rev capacity and crisp, linear throttle response.
  • 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 fully adjustable competition-spec Kayaba piggyback shocks with 9.1 inches of travel and separate adjusters for preload, rebound and compression damping.
  • New rear suspension system is YZ linkage-type, controlled by a fully adjustable Showa shock with 10.6 inches of travel and separate adjusters for preload, rebound and compression damping.
  • Ultra-rigid cast aluminum swingarm reduces weight and ensures optimal suspension action.
  • Numerous aluminum components—including the swingarm, upper A-arms, oil tank 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 160mm front discs with twin-piston calipers and single 200mm rear disc, deliver incredible stopping power with progressive control and feel.
  • New high-performance 21 x 7R-10 front and 20 x 10R-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.
  • Large-capacity, 2.6 gallon fuel tank ensures excellent range.
  • Dual 30-watt multireflector halogen headlights set back in the front cowl add the perfect menacing appearance. Taillight has an incorporated brake light for added convenience.
  • Easy-to-use, toggle link-type handlebar-mounted parking brake can be set with one hand.


  • MSRP:* $7,449
         Bill Ballance Edition w/Kit (Team Yamaha Blue/White) Available from September 2005
         $6,999 (Team Yamaha Blue) Available from July 2005
         $6,999 (White/Silver) Available from July 2005


  • Type: 449cc, 4-Stroke Single, Liquid Cooled w/ Fan, Titanium 5-Valve DOHC
  • Bore x Stroke: 95mm 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 Manual Clutch
  • Drive Train: 2WD; Sealed O-Ring Chain, Cam Style Adjustment


  • Suspension/Front: Independent Double Wishbone, 9.1” w/ Rebound, Compression and Threaded Preload Adjustment
  • Suspension/Rear: Cast Aluminum Swing Arm, 10.6” w/ Rebound, Compression and Threaded Preload Adjustment
  • Brakes/Front: Dual Hydraulic Disc, Twin Piston
  • Brakes/Rear: Hydraulic Disc, Twin Piston
  • Tires/Front: AT21 x 7-10 Radial
  • Tires/Rear: AT20 x 10-9 Radial


  • L x W x H: 72.4” x 46.1” x 42.9”
  • Seat Height: 31.9"
  • Wheelbase: 50.4”
  • Ground Clearance: 4.4”
  • Fuel Capacity: 2.6 Gallons
  • Dry Weight: 350 Lbs.


  • Lighting: Dual 30W Krypton Multi-reflector Headlights & 21/5W Brake light
  • Warranty: 6 Month (Limited Factory Warranty)

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