2005 Yamaha YFZ450
Welcome To the New ATV World Order
Very simply, the YFZ450 is the most competition-ready production ATV that’s ever been built, and the winner of just about every major magazine shootout.** “The YFZ is the best sport quad that has ever been made.” ATV Rider, 2004
“… the Yamaha YFZ450is at the top of the high-performance class.” Dirt Wheels, 2004
Not only is the hybrid 439cc DOHC titanium-valved five-speed engine far superior to anything that's come before, at 350 pounds, the YFZ450 is endowed with the highest power-to-weight ratio of any four-stroke ATV ever built.
Yes, it even has electric start, and when you open the 39mm Keihin carburetor all the way, you'll also appreciate the lowest center of gravity in the class and the latest industry-leading suspension technology. The Special Edition model adds a sportier, more menacing edge with a black frame, yellow bodywork with black accents. But we’re just getting warmed up here, so why don’t you visit the Features & Benefits page to get a closer look at the YFZ450's list of incredible features.
It's simple. You'll either be riding a YFZ450 this season or trying to catch up to one. The YFZ450 is the "ATV of choice" for many top racers. Visit ATV Racing to see the results.
Manufacturer's Suggested Retail Price...$6,899 - $7,099* **ATV and Sport, ATV Rider, ATV Action, ATV Illustrated, ATV Sport, ATV Rider, Offroad.com (Canada)
Features
Additional Features
Aggressive YZ-inspired styling of front cowl, tank, fenders and seat establishes this machine’s pure competition purpose.
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.
Rugged 45mm-wide serrated footrests provide excellent grip and rider comfort.
Large-capacity, 2.6 gallon fuel tank ensures excellent range.
Easy-to-use, toggle link-type handlebar-mounted parking brake can be set with one hand.
All
A new, seat increases comfort over the course of long motos and has a non-slip surface.
Liquid-cooled, 439cc, 5-valve, DOHC, four-stroke with titanium valves features 95mm bore and 62mm stroke delivering, broad torque curve (for instant hook-up) with high over-rev capacity and crisp, linear throttle response.
California green sticker compliant.
Revised front suspension settings for improved bump absorption, and reduced rider fatigue.
Aluminum alloy shift and rear brake levers are lighter, and provide a more positive feel.
Reliable, push-button electric start in any gear adds extra convenience.
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.
Forged piston features short skirt and small pin boss diameter to help reduce weight.
High performance 39mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS) delivers ultra-precise fuel/air mixing and instant throttle response.
Lightweight titanium valves (first ever on an ATV) and load-reduced springs are super light, minimizing reciprocating mass for fast-revving, hard-hitting power delivery across the RPM range.
Ignition coil is integrated into the spark plug cap, the first time ever used on an ATV, and is extremely light and compact.
Additional weight-saving engine features include: magnesium cylinder head cover & 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.
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.
Rear suspension system is a YZ linkage-type that features fully adjustable Showa shock with 10.1 inches of travel and separate adjusters for preload, rebound and compression damping.
Removable aluminum die-cast rear subframe removes easily for maintenance.
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.
Chassis/Suspension
State-of-the-art high-tensile steel chassis utilizes the most advanced suspension technology ever fitted to an ATV for pure-competition-spec performance right off the showroom floor.
Ultra-rigid cast aluminum swingarm reduces weight and ensures optimal, flex-free 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.
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.
Ultra-compact, race-bred chassis design creates a short 50.4-inch wheelbase and low center of gravity to create a super-tight turning radius.
Long, low and narrow YZ-style seat enhances the low center of gravity for quick, balanced steering and optimal rider movement.
Lightweight aluminum wheels help enhance suspension performance by reducing unsprung weight.
Engine
Digital CD ignition system delivers ultra-precise spark and 3D timing for faster, stronger engine response during hard acceleration.
Lightweight crankshaft keeps inertial mass to a minimum for faster-revving low-rpm response.
High-performance stainless steel exhaust header (and heatshield) is mated to a USFS-approved spark arrestor which looks trick and resists corrosion.
The large-capacity radiator is optimally mounted in the frame to keep the center of gravity low but away from mud or rock damage and provides outstanding cooling efficiency.
Smooth-shifting YZ-spec ratchet-type manual 5-speed transmission delivers engine’s potent powerband to the ground with maximum efficiency and hook-up.
Heavy-duty manual clutch features extra-thick plates specifically designed for the YFZ450.
Large capacity airbox features no-tool access to the oiled dual foam filter for easy maintenance.
2005 Yamaha YFZ450
Specifications
Engine
- Starting System
- Electric
- Bore x Stroke
- 95mm x 62mm
- Compression Ratio
- 11.9:1
- Carburetor
- Keihin 39mm FCR w/ Throttle Position Sensor
- Fuel Capacity
- 2.6 Gallons
- Engine
- 439cc, 4-Stroke Single, Liquid Cooled w/ Fan, Titanium 5-Valve DOHC
Transmission
- Ignition
- DC - CDI
- Transmission
- 5-Speed Manual Clutch
- Drive Train
- 2WD; Sealed O-Ring Chain
Chassis
- Suspension Front
- Independent Double Wishbone, 9.1” w/ Rebound, Compression and Threaded Preload Adjustment
- Suspension Rear
- Cast Aluminum Swing Arm, 10.1” w/ Rebound, Compression and Threaded Preload Adjustment
- Brake Front
- Dual Hydraulic Disc, Twin Piston
- Brake Rear
- Hydraulic Disc
- Tires Front
- AT21 x 7-10 Radial
- Tires Rear
- AT20 x 10-9 Radial
Dimensions
- Dimensions (LxWxH)
- 72.4” x 46.1” x 42.9”
- Seat Height
- 31.5”
- Wheelbase
- 50.4”
- Ground Clearance
- 4.4”
- Dry Weight
- 350 Lbs.
General Information
- Lighting
- Dual 30W Krypton Multi-reflector Headlights & 21/5W Brake light
- Warranty
- 6 Month (Limited Factory Warranty)
Colors
- Colors
- Team Yamaha Blue/White; White/Red; Yellow/Black (Special Edition)
Photos