2007 Yamaha WR Review


Yamaha, the Japanese motorcycle manufacturer, made major changes to its WR off-road bikes in 2007. The 250F and 450F got new aluminum frames, similar to those on the YZ motocross models, reworked suspension, and a new engine design with a built-in sump and enclosed oil passages. Both models are powered by liquid-cooled, four-stroke, single-cylinder engines. The 250F’s engine has a 249cc displacement; the 450F displaces 449cc. Both have dual overhead cams with five valve heads and Keihin carburetors. The five-speed manual transmissions on both models are chain-driven. The new suspension system uses Kabaya inverted forks in front, with adjustable preload and rebound damping, and twin-sided swing arms in the rear, with adjustable spring preload and rebound damping. Reviewers thought that the new suspension worked better for woodland trails than the system it replaced, but which was better suited to desert riding. Stopping power comes from 9.8-inch disc brakes in front, and not much smaller discs in back.

Famous for toughness and reliability, the 2007 Yamaha WR met air-quality standards in all 50 states. The new engine struck reviewers as livelier and smoother than previous years. And the new frame made it less bulky, with solid and seamless feeling.

New For 2007

  • New aluminum frame
  • Improved suspension
  • Closer ratio transmission
  • New, simpler design for engine

2007 Yamaha WR Specs

  • Model: WR 250F; WR 450F
  • Engine Type: 249cc (250F); 449cc (450F), liquid-cooled single cylinder
  • Bore and Stroke: 3.03 inches x 2.11 inches (250F); 3.74 inches x 2.5 inches (450F)
  • Compression ratio: 12:5:1 (250F); 12:3:1 (450R)
  • Valve Train: DOHC, five valves per cylinder
  • Induction: Keihin carburetor
  • Ignition: Electric/kick
  • Transmission: Five-speed manual
  • Final Drive: Chain
  • Fuel Capacity: 2.1 gallons
  • Estimated Fuel Economy: N/A
  • Brakes (Front): 9.8-inch disc
  • Brakes (Rear): 9.6-inch disc
  • Suspension (Front): Inverted fork with adjustable preload and rebound damping
  • Suspension (Rear): Twin-sided swing arm with adjustable spring preload and rebound damping
  • Wheelbase: 58.2 inches (250F); 58.5 inches (450F)
  • Rake: N/A
  • Trail: N/A
  • Seat Height: 38.5 inches
  • Curb Weight: 233.7 pounds (250F); 246.9 pounds (450F)
  • Tires (Front): 80/100 R21
  • Tires (Rear): 100/100 R18 (250F); 110/100 R18 (450F)


  • 270mm Oversized Front Disc Rotor Kit
  • Aluminum Hot Start Lever
  • Aluminum Hot Start Lever
  • Billet Aluminum Front Sprocket Cover
  • N/A
  • GYT-R Billet Clutch Cover
  • GYT-R Black Carbon Fiber Upper Fork Guards
  • GYTR Pivoting Front Brake Lever
  • GYTR Service Stand
  • Plastic Chain Guard
  • Yamaha Factory Racing Crossbar Pad

Key Competitors For The 2007 Yamaha WR

  • 2007 Suzuki DR-Z 250
  • 2007 Honda CR 450R
  • 2007 Honda CRFX
  • 2007 Honda CRF 250R
  • 2007 KTM 450 EXC Racing
  • 2007 Aprilia RXV 4.5