The award and championship-winning YFZ450 comes standard with the most powerful, industry-exclusive five titanium valve engine, ultra-compact, lightweight, high-tensile steel frame with fully adjustable suspension and electric start.
| Key Features: |
- The lightest, most powerful 450 class ATV, 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.
- 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.
- Front brake master cylinder and lever give excellent feel and feedback.
- Drilled rear brake disc reduces unsprung weight and offers excellent feel and feedback.
- A internal oil jet aimed at the piston bottom keeps things cool and well lubricated.
- 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 21×7R-10 front and 20×10R-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.
- 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.
|
| 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 |
|
| Fuel Delivery |
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 |
|
| Wet Weight |
372 lb |
|
|
| Other |
| Lighting |
Dual 30W Krypton multi-reflector headlights & 3.9/0.5W LED brakelight |
VN:F [1.8.3_1051]
Rating: 5.0/5 (1 vote cast)
VN:F [1.8.3_1051]
2009 Yamaha YFZ4505.051
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