2012 YZ250F/450F

2012 YZ250F/450F
Here’s the first look at the new Yamaha YZ250F and 450F, along with the pertinent data from the corporate headquarters.

Yamaha YZ250F

2012 YZ250F HIGHLIGHTS

•Most reliable engine in the class

•Improved engine performance through reduced reciprocating mass and friction.

•Increased top end power from 8,000 to 12,000rpm

•Reduced vibration felt at rider touch points (handlebars, seat, footpegs)

Yes Martha, the new YZ250F is still carbureted, though the new engine has been on

receiving end of many changes targeting more mid to top power.

There have been a myriad of changes and updates to the frame and suspension

CHASSIS AND HANDLING:

•New frame with unique 3-box bilateral beam frame consisting of 20 aluminum pieces

•Chassis rigidity feel is very balanced and forgiving in rough sections

•Lightweight handling and easy to change direction when jumping

•One of the best in class when it comes to carving those tight inside lines through corners

•Very stable and neutral handling that suits a wide range of rider skill levels

SUSPENSION:

•Outstanding suspension comfort and bump absorption due to our KYB SSS front forks and large

capacity piggyback shock

•Great suspension settings that suit a wide range of riders thanks to our rigorous testing program

•KYB Speed Sensitive System (SSS)

Front forks have been revalved

•Fork offset is now 22mm (was 25mm)

•Fork outer tube changed to match new

frame rigidity

•Steering stem longer to increase rigidity.

•Overall fork torsional rigidity increased

50%

•Fork spring rate is .46kg/mm (was

.45kg/mm)

NEW FRONT FORKS AND

TRIPLE CLAMPS

REAR SHOCK:

•New KYB Piggyback Rear shock has revised

rebound damping, 46mm piston and16mm

shock shaft (was 18mm)

•New swingarm with increased rigidity in axle

block area

•Improved bump absorption

•More refined damping character which

allows riders to attack rough sections with

more confidence

COMPONENTS:

•Comes with industry leading Pro Taper handlebars mounted to four position capable top tiple

clamp/bar mounts

•Ultra-wide footpegs

•Sunstarsprockets and gold D.I.D. chain

•Braking rotors

•Black Excel Rims

•Bridgestone tires

2012 YZ450F

2012 YZ450F HIGHLIGHTS

•Most advanced engine in the class

•Awesome low to mid power with improved roll-on characteristics

•Power characteristic can be adjusted to the rider’s preference with the GYTR Power Tuner

ENGINE:

SILENCER
•Reduced sound output to meet AMA Pro Racing 94db regulation.
•42.0mm longer
•3.0mm smaller outlet

CHASSIS AND HANDLING:

•Unique double “S” bend bilateral beam frame

•Chassis layout provides ultimate centralization of mass

•Chassis rigidity feel is very balanced and forgiving in rough sections

•Lightweight handling and easy to change direction when jumping

•One of the best in class when it comes to carving those tight inside lines through corners

•Very stable and neutral handling that suits a wide range of rider skill levels

SUSPENSION:

•Outstanding suspension comfort and bump absorption due to our KYB SSS front forks and large

capacity piggyback shock

•Great suspension settings that suit a wide range of riders thanks to our rigorous testing program

COMPONENTS:

•Comes with industry leading Pro Taper handlebars mounted to four position capable top triple clamp/bar mounts

•Ultra-Wide footpegs

•Sunstar sprockets and Gold D.I.D. Chain

•Braking rotors

•Black Excel rims

•Dunlop Geomax Tires