2010 Yamaha YZ450F - Final Answer?

A backwards cylinder is just the beginning

By Brian Catterson, Photography by Dirt Rider Magazine, Karel Kramer

tech
Spec
Evolution

Latest and greatest iteration of the YZ400/426/450 line, with its cylinder spun 'round backwards.

Rivals
Honda CRF450R, Husqvarna TC450, Kawasaki KX450F, KTM 450SX, Suzuki RM-Z450.

TECH SPEC
Price $8090 (as tested)
Engine type l-c single
Valve train DOHC, 4v
Displacement 449cc
Bore x stroke 97.0 x 60.8mm
Compression 12.5:1
Fuel system EFI
Clutch Wet, multi-plate
Transmission 5-speed
Claimed horsepower na
Claimed torque na
Frame Aluminum perimeter
Front suspension 48mm Kayaba inverted fork with adjustable compression and rebound damping
Rear suspension Kayaba shock with adjustable spring preload, high/low-speed compression and rebound damping
Front brake Nissin two-piston caliper, 250mm disc
Rear brake Nissin single-piston caliper, 245mm disc
Front tire 80/100-21 Dunlop D742F
Rear tire 120/80-19 Dunlop D756
Rake/trail 26.9 deg./4.7 in.
Seat Height 39.3 in.
Wheelbase 58.7 in.
Fuel Capacity 1.6 gal
Claimed wet weight 245 lbs.
Colors Team Yamaha blue/white, red/white
Available Now
Warranty 30 days

Contact
Yamaha Motor Corp. USA
6555 Katella Ave.
Cypress, CA 90630
800.962.7926
www.yamaha-motor.com

Verdict 4.5 stars out of 5
The biggest breakthrough in motocross since the 1998 YZ400F that ushered in the Four-Stroke Revolution.

By Brian Catterson
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