2012 Yamaha YZ450F Review

4 Май 2015 | Author: | Комментарии к записи 2012 Yamaha YZ450F Review отключены
Yamaha YZ 450F

2012 Yamaha YZ450F

2012 Yamaha YZ450F

Yamaha YZ450F Review

staring, take it to the line.

The YZ450F: So forward thinking else seems backwards.

and even more responsive, the new Yamaha YZ450F delivers confidence off the start gate, in the and over jumps.

There’s like sitting on the starting knowing that you’ll be to the corner first.

The new YZ450F to be admired by racers and mechanics It’s backward, rearward cylinder and tornado exhaust is mechanical genius-and it’s to Yamaha’s YZ450F! By moving weight to the centre of the bike, it up the front end for quicker turning and balance. In fact, on the track, the feels like a 250F-until you the throttle!

If you thought the ’11 was snappy, wait until you the ’12; fuel injection have been updated for faster response. Weight has shaved as well by using new in the front and rear suspension. is king in racing.

Get it with the

Other bikes, please to the rear.

The revolutionary 2012 YZ450F will have gazing far into the future. By the cylinder rearward and reversing the and exhaust ports, the 2012 mass is more centralized for balance, unprecedented handling and The Bilateral Beam frame and offer fantastic feedback to the

Add fuel injection to the mix of these and you’ll agree: backward is the way forward.

2012 Yamaha Highlights and Key Features:


GYTR Power Tuner: power delivery

Key Features:

still revolutionary design include its rearward-slanted cylinder achieves unmatched mass concentrating inertial mass the center of the machine. This design swaps traditional and exhaust positions, putting the airbox and throttle body out This contributes to mass for nimble handling while achieving a straight intake for superb combustion efficiency delivers more power.

cylinder is offset so the connecting rod is at the moment of greatest combustion minimizing piston friction the cylinder wall that rob power. That means response.

-The 4-titanium cylinder head is matched to a recalibrated fuel injection that provides superb power feeling. Instantly to changing air/fuel mixtures on altitude and temperature, for an engine delivers no matter what

-The aluminum double -S- Bilateral Beam frame a superb rigidity balance with new front and rear settings, provides unmatched handling and cornering. Combined the mass centralization provided by the YZ450F for 2012 is a formidable, package.

-Accessory GYTR® Tuner lets bike adjust air/fuel mixture and timing maps to match performance characteristics to the rider and conditions.

New for 2012:

-Revised injection settings (mapping for and advance) offer smooth, engine response in the low-to-mid-rpm

-New, longer 94 dB muffler.

programming is updated to optimize characteristics with the new-spec

-New front and rear settings and valving deliver smooth suspension performance.

Geomax® MX51 tires great all-round traction.

color options feature black rims and a gold-color chain.

2012 Yamaha Features and Benefits


liquid-cooled, 450cc, DOHC, (titanium), 4-…, single fuel injection. The engine has tuned for excellent drivability and one of the keys to fast lap times. The delivers a broad power with a great over-rev

Unique engine design a rearward slanting cylinder is reversed compared to traditional The FI throttle body and air box are front while the exhaust exits the rear of the cylinder. This is used to centralize mass for handling and a light feel. The major benefit is the straight intake system which power output.

The engine is 7.5 degrees rearward.

The reversed allows for a straight intake into the cylinder, providing intake flow and efficiency for power. The front positioned means that engine will have less effect on the incoming fuel (cooler fuel helps power).

Centrally located plug and the 4-valve head a tumbling effect of the inbound / air for better combustion, improved response and power output.

4-valve cylinder head features a 12.5:1 compression The intake valves are 36mm in and the exhaust valves are 30mm.

Lightweight titanium valves exhaust) and load-reduced oval springs reduce reciprocating for less friction, faster-revving and power delivery across the rev

Automatic cam chain tensioner maintenance while special cam sliders reduce internal losses.

High performance, weight hollow intake and camshafts.

The lightweight aluminum features a ceramic composite applied directly to the aluminum, the need for a heavy iron or liner. The ceramic coating faster, more uniform dissipation, reduced friction and a service life.

The cylinder is relative to the crankshaft to reduce losses between the piston and the wall during the power This offset design is a on a Yamaha motocross machine.

design utilizes an integrated oil inside the cases to supply oil to the dry lubrication system. This concentrates mass lower in the for optimum handling and lighter feeling. There are no exterior oil or tank with this

Special cylinder design cutaways that allow the air under the piston to enter a chamber (or cutaway) to reduce pumping losses.

The crankcase utilizes cutaways to reduce losses. The crankcase cutaways the cutaways in the cylinder for maximum

Lightweight, short-skirt, forged provides excellent reliability, mechanical vibration and reduced

Piston oil cooler utilizes a nozzle that directs oil to the portion of the cylinder and underside of the which reduces piston, and rod temperatures for great durability.

Oil in the engine has been optimized to weight and oil drag related losses.

Lightweight gear balancer shaft reduces for improved rider comfort and rider fatigue.

The crankcase a tri-axis layout for the crank, and drive axles. This design keeps the crankcase compact while also mass for excellent handling. All of the are positioned low in the cases to maintain a low of gravity.

Revised 5-speed features involute splines on the axles to ensure smooth and instant hook-up under The shift cam and shifter forks been revised for more shifting and improved feel.

transmission optimizes engine This 5-speed transmission great performance and makes the very versatile for MX, Hare Super Moto, Ice Racing and type applications.

Quick-access, lightweight magnesium clutch cover for fast, clutch maintenance.

Keihin throttle body fuel system is a battery-less design for weight and is designed specifically for off applications. The 12-hole injector fuel atomization for more combustion and great power The benefits of fuel injection constant ongoing adjustments to the optimum fuel — air regardless of outside air temperature and

Other benefits include starting and improved throttle The system is equipped a throttle sensor (TPS), plus a of sensors (engine temp, air temp and air pressure etc.). is also a cold start and idle knob which as an idle adjuster too.

The spray pattern, spray and the distance to the intake valves been optimized, while the designed straight intake helps to maximize the benefits of the FI and overall power output.

compact, hand held YZ Tuner allows tailoring of fuel injection settings and mapping. Nine (9) different points can be accessed for both the FI and maps. Maps can be stored and with other Power if desired.

Compact, lightweight electric fuel pump

capacity ACM (alternating current is used to eliminate the need for a

Automatic decompression system easy starts in any gear.

Air box behind the steering head) a straight shot intake and a washable, dual-stage, foam air

Tornado design exhaust exits from the rear of the The spiral winding of the header provides the correct tuned and takes full advantage of the pulse effect to maximize filling. There is a resonator (or chamber) built into the pipe. Another key benefit of exhaust system is mass

Revised re-packable lightweight / stainless steel muffler silencer) is 42mm longer in 2011 with a longer exit spigot. The sound is 94dba to meet the current AMA regulation. Muffler disassembly is since the silencer bolts with Allen screws.

lightweight, single core, radiators provide outstanding efficiency

Revised high powered ECU the fuel injection mapping and timing mapping. The ECU has been for improved low and mid range performance.

G sensor system will down the fuel injection if the bike lies on its side for than 10 seconds to help costly engine damage. is no special procedure to re-start the — just kick it and go.

race-spec barrel adjuster for clutch lever free adjustments.

Easy access oil


Compact beam aluminum frame mass for exceptional handling. 450cc class specifically frame consists of a High Die Cast head pipe, formed main rails various forged and extruded This frame is compact and excellent rider — communication (a.k.a. feedback). The have optimized the balance strength, rigidity and flex.

The key of the chassis is faster and easier — one of the main keys to races. The engineers started a clean sheet of paper and the chassis based on the requirements of a motocrosser. Note: the YZ450F is unique, it is not the same as the YZ250F

The rigidity balance of the frame has optimized and features high and torsional rigidity with flex in the longitudinal direction. The is a feeling of lightness, agility and traction.

Lightweight, tapered, swingarm is produced using forming, a special method uses high pressure to form shapes. The swingarm shaft is 17mm.

Lightweight rear sub frame is constructed of lightweight aluminum pipe. The design allows easy when servicing rear components.

Cast aluminum and forged aluminum lower clamps. Fork off set is 22mm.

handlebar clamps offer a of 4 different handlebar positions an adjustment range of 30mm, to a wide variety of riders.

handlebar provides excellent and durability. Foam handlebar pad is

Revised, 48mm, adjustable, Kayaba cartridge fork 310mm (12.2) of wheel Front forks have re-valved to increase low-to-mid damping. The fork is also due to an internal weight reduction of the head and tank (these are internals — not engine

The fork features a twin-chamber, Sensitive design meaning the unit is in a separate structure prevents aerated fork oil entering the inner damper and reducing its damping abilities. the inner damper is pressurized, it eliminates bubbles forming in the

Front fork adjustments 20-way compression damping and rebound damping. Optional springs are available through Yamaha parts.

The balance the inner and outer fork is optimized, while the Kashima on the pressure tank and the piston rod friction for smoother suspension

The 48mm inverted KYB fork features a Transfer Control (TCV). The TCV enhances the damping from mid to full … and bottoming characteristics. The benefit of TCV is precise control throughout the suspension ….

The TCV is located on the of the spring and its function is controlled by speed, not piston position hence the term Speed fork.

Large wrap-around fork protectors provide lower fork tube The self-supporting design reduces for smoother fork operation.

link rear suspension features a revised, fully large capacity, 50mm piggyback shock which 315mm (12.4) of wheel and features separate adjusters for and low-speed compression damping. The shock features a valving on the rebound side for improved with less bottoming, a new adjuster oil passage and improved with less low-speed and more high-speed compression.

The is in-line with the center of the bike for excellent control. adjustments include: spring 30-way rebound damping, low-speed compression damping and 2 of high speed compression

The shock uses an 18mm piston rod. Kashima is used in the shock body and sub to reduce friction and improve performance during a long The Kayaba shock utilizes a rebound oil lock system for suspension function and great quality.

250mm floating wave-style disc reduces improves cooling and adds too. The disc is squeezed by a Nissin twin piston fitted with lightweight pistons.

Shorty style front brake lever can be to fit various hand sizes.

rear disc brake a wave-type disc. The rear is squeezed by a single compact piston caliper.

Lightweight, compact, integrated rear master cylinder reservoir is integrated into the top of the cylinder) provides strong power with excellent and control.

The rear caliper and the portion of the wave disc are by heavy duty plastic

Compact body work the lightweight feel and look of the This minimal design is a flat design, allowing for easy rider movements. The provide a natural and roomy position.

The body has been to maintain it good looks the life of the machine.

Lightweight, resin 6.2 litre fuel is located mostly under the once again reducing the of gravity and centralizing mass for handling performance.

Lightweight Sun rear sprocket.

Rugged, 21 and 19 rear Excel rims exceptional durability and help unsprung weight for optimal performance and handling.

Large rear axle and a hub design features a second bearing on the side for increased rigidity and

Revised seat material weight and improves rider The pebble seat surface has been designed to give a when needed, yet still easy rider movements. The cover resists clogging dirt or mud to ensure long good looks.

E10 friendly system components

New Dunlop MX51 Tires.


Polypropylene engine and pump guards reduce

Lightweight, extra wide pegs provide excellent and ground clearance.

Folding lever tip helps prevent

Adjustable clutch lever can be to fit various hand sizes.

steel, inner clutch provides excellent strength and life.

Heavy duty coloured DID 520 drive chain

Yamaha YZ 450F
Yamaha YZ 450F
Yamaha YZ 450F
Yamaha YZ 450F


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