2012 Yamaha YZ450F & YZ250F First Looks — Motorcycle USA

9 Апр 2015 | Author: | Комментарии к записи 2012 Yamaha YZ450F & YZ250F First Looks — Motorcycle USA отключены
Yamaha YZ 450F
Yamaha YZ 450F

2012 Yamaha YZ450F First Looks

The 2012 includes updates to its fuel suspension and tires.

The boys in are at it again. Yamaha brings modest upgrades to its motocross revamping the YZ450F and YZ250F for

The YZ450F already stands on the motocross scene with its cylinder, the Yamaha claiming performance from its offset and centralized weight. These design elements have fundamental to the 450F and remain But to keep the YZ450F one step of the competition, the 2012 model offer revisions to its fuel suspension and tires.

Aesthetically the model also new color profiles, which black rims and a gold-colored chain.

One thing Yamaha has for the new model year is update its map and optimize the ignition timing. The was to create a smoother throttle and generate more low to mid-range with improved roll-on The 2012 YZ450F also a 42.0mm longer silencer reduced sound output in with new AMA Racing regulations limit exhaust to 94db.

claims the updates to the 450F smoother throttle response and low to mid-range power.

Shifting on the model was given a boost by the locating pin to make the shift bar rigid. The claimed result is precise shifting on the 450F, between second and third.

Both the front fork and shock have been to improve bump absorption and to dive while cornering. Up the fork is revalved for low to mid-speed damping. Meanwhile, the shock not has revised rebound characteristics, but gets a new valve setting for high-speed compression.

Dunlop MX51 tires replace the D742FA and D756 rubber, Yamaha touting improved as a result. The 2012 YZ450F is adorned with black on its blue bike instead of the silver.

In addition to these the GYTR Power Tuner for the 2012 YZ450F which users to adjust fuel and maps manually. The device is useful for those who wish to the most out of their bike on weekend trips to the track. than nine points are and users can also get info on running time, water and temperature, throttle position and

The YZ250F has several key changes to its and frame, giving it more and strength in its chassis.

2012 YZ250F

The Yamaha YZ250F is dealer floors in 2012 a host of beefy upgrades to the motocrosser. New design elements are throughout the frame, engine, and gearing giving the 250F an for the upcoming year.

Yamaha first started the frame by adding a three-box rail section instead of its two-box design for increased The frame design also a new swingarm pivot point and new brackets for more predictable

Housed within the new frame is a re-worked engine. Yamaha for a lighter piston, piston pin and circlip. Yamaha claims the new gives better performance by overall mass and friction, more power from rpm. Yamaha engineers took into account on the 250F, revising the crankshaft to reduce the vibes felt at key touchpoints including the handlebars, and footpegs.

In addition, the balancer is now optimized for the lighter piston, further reduces vibration.

Biggest news for the 2012 is what’s not changed, as the YZ remains the 250 to shun electronic fuel Yamaha did tweak the carburetor, boring it out another 2mm, and a air filter cage has been inside the 250F to enhance performance. CDI settings have been reformatted to give the better throttle response in the mid to range, and a new silencer with a outlet is designed to meet AMA Pro sound regulations.

Up front the KYB Sensitive System fork is and is now offset by 22mm. The outer has also been enhanced for 50% rigidity, and the steering stem was longer. The spring rate on the is now 0.46kg.

The 250F’s rear shock new rebound damping and a new swingarm more strength to the axle Yamaha touts that changes add more refined character and improve bump allowing for more aggressive on the track.

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