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2012 Yamaha YZ450F
Other bikes, please move to the rear.
The revolutionary new YZ450F will have many gazing far into the future. By slanting the cylinder rearward and reversing the intake and exhaust ports, the YZ450F's mass is more centralized for amazing balance, unprecedented handling and cornering. The Bilateral Beam frame and suspension offer fantastic feedback to the rider. Add fuel injection to the mix of these new innovations and you'll agree: backward is the right way forward.
Pricing/Color Information
Features
All
Key Features - YZ450F’s still revolutionary design advancements include its rearward-slanted cylinder that achieves unmatched mass centralization, concentrating inertial mass toward the center of the machine. This bold design swaps traditional intake and exhaust positions, putting the lightweight airbox and throttle body out front. This contributes to mass centralization for nimble handling while also achieving a straight intake tract for superb combustion efficiency that delivers more power.
Key Features - The cylinder is offset so the connecting rod is vertical at the moment of greatest combustion force, minimizing piston friction against the cylinder wall that could rob power. That means quicker response.
Key Features - The 4-titanium valve cylinder head is matched to a newly recalibrated fuel injection system that provides superb low-to-mid-rpm power feeling. Instantly adapts to changing air/fuel mixtures depending on altitude and temperature, for an engine that delivers no matter what conditions.
Key Features - The 4-titanium valve cylinder head is matched to a fuel injection system developed specifically for the YZ450F. Instantly adapts to changing air/fuel mixtures depending on altitude and temperature, for an engine that delivers no matter what conditions.
Key Features - The aluminum double “S” bend Bilateral Beam frame provides a superb rigidity balance and, with new front and rear suspension settings, provides unmatched lightweight handling and cornering. Combined with the mass centralization provided by the engine, YZ450F for 2012 is a formidable, well-tuned package.
Key Features - Accessory GYTR® Power Tuner lets bike tuners adjust air/fuel mixture and ignition timing maps to match engine performance characteristics to the rider and track conditions.
Engine - The rearward-slanted engine allowed engineers to design straight intake and exhaust ports, creating the most direct path for air flow into the fuel-injected engine for incredible performance.
Engine - The YZ450F uses a battery-less fuel injection system with a 12-hole injector for superb fuel atomization. The 44mm Keihin® throttle body is designed for easy starting, with an integrated cold start and idle speed adjustment knob. Yamaha FI provides optimal air/fuel mixtures in all altitudes and wide range of temperatures for outstanding throttle response.
Engine - 14 volt / 110W high output generator powers the battery less fuel injection system.
Engine - 4-titanium valve cylinder head with a “pent-roof” design combustion chamber provides excellent combustion efficiency and unequalled power output.
Engine - The big 97.0mm bore and short 60.8mm stroke, along with a high 12.5:1 compression ratio, create a combustion chamber that delivers really impressive power.
Engine - The air filter case is changed to accommodate the engine layout. Putting it up front keeps dirt and dust kicked up from the rear tire away from the intake system.
Engine - “Tornado-style” exhaust header with resonator efficiently scavenges exhaust gasses and helps the engine achieve its exceptional low-to-mid range torque characteristics, while the 150mm-longer muffler comfortably meets the latest noise standards without a sacrifice of power.
Engine - Clutch and transmission components have been designed to give the rider great shifting feel.
Chassis/Suspension - The aluminum double “S” bend Bilateral Beam frame is crafted from a carefully chosen combination of forged and extruded aluminum, 16 components in all, for the right rigidity balance and light weight. A very symmetrical chassis design promotes nimble handling, letting riders enter and exit corners as quickly as possible to put the competition behind them.
Chassis/Suspension - Skid plate is constructed from tough polypropylene for great protection and low weight.
Chassis/Suspension - The swingarm and rear shock are redesigned, with the shock mounted along the central axis of the frame, taking advantage of the space no longer needed for the front-mounted airbox. This optimized combination delivers exceptionally linear performance for excellent bump absorption and awesome cornering ability.
Chassis/Suspension - The KYB® Speed Sensitive front fork has excellent feel and shock absorption.
Chassis/Suspension - KYB® rear shock with large capacity piggy back reservoir and 50mm piston for more consistent damping control.
Chassis/Suspension - Fuel tank is positioned underneath the seat, contributing to the centralized mass. The seat is long and flat for to allow free rider movement.
Chassis/Suspension - The triple clamps have 22 mm offset for unequalled cornering performance. The ProTaper® bars are 4-way adjustable to accommodate a wide range of riders.
Chassis/Suspension - The front and rear fenders, along with the number plate, side cover and front fork protector have been designed for an aggressive look. The bike’s minimalistic design accentuates its handling character. A minimum of plastic means the lightweight aluminum frame can be exposed for an enhanced performance look.
Chassis/Suspension - Fuel pump is small and lightweight, as is the compact transistor ignition unit.
New for 2012: Revised fuel injection settings (mapping for injection and advance) offer smooth, controllable engine response in the low-to-mid-rpm range.
New for 2012: New, longer 94 dB muffler.
New for 2012: ECU programming is updated to optimize performance characteristics with the new-spec muffler.
New for 2012: New front and rear suspension settings and valving deliver exceptionally smooth suspension performance.
New for 2012: Dunlop® Geomax® MX51 tires provide great all-round traction.
New for 2012: New seat foam material has an excellent cushion feel.
New for 2012: Both color options feature rich-looking black rims and a gold-color drive chain.
2012 Yamaha YZ450F
Specifications
Engine
- Fuel Capacity
- 1.6 gal
- Fuel Delivery
- Yamaha Fuel Injection (YFI), Keihin® 44mm
- Compression Ratio
- 12.5:1
- Bore x Stroke
- 97.0 x 60.8mm
- Engine
- 449cc liquid-cooled DOHC 4-stroke; 4 titanium valves
Transmission
- Final Drive
- Chain Drive
- Transmission
- Constant-mesh 5-speed; multiplate wet clutch
- Ignition
- TCI
Chassis
- Tires Rear
- 120/80-19-Dunlop® D-756
- Tires Front
- 80/100-21-Dunlop® D-742FA
- Brake Rear
- Hydraulic single disc brake, 245mm
- Brake Front
- Hydraulic single disc brake, 250mm
- Suspension Rear
- KYB® Fully adjustable single shock; 12.4-in travel
- Suspension Front
- KYB® Speed-Sensitive System, inverted fork: fully adjustable, 12.2-in travel
Dimensions
- Ground Clearance
- 15.2 in
- Wheelbase
- 58.7 in
- Seat Height
- 39.4 in
- Height
- 51.6 in
- Width
- 32.5 in
- Length
- 86.4 in
- Wet Weight
- 245 lb
General Information
- Warranty
- 30 Day (Limited Factory Warranty)




