YAMAHA WR450F (2003-2004) Specs, Performance & Photos

The Yamaha WR450F was an off-road motorcycle part of the WR series, comprising models with different engine displacements. The bike was first delivered in 1998 with a 400cc engine and was manufactured over several generations.

In 2004, the Japanese maker launched the Yamaha WR450F, an off-road machine in its third generation with a 449cc engine, a smaller fuel tank, and an electric starter. The bike shared many components and design concepts with the Yamaha YZ400F motocross model.

The 2004 machine featured several modifications, including revised settings, an anti-stiction coating on the front fork, a new aluminum-piston brake caliper, a new gripper-style seat, and a new kickstand.

In the power department, the WR450F machine packed the same 449cc four-stroke liquid-cooled single-cylinder engine as the previous model and boasted 58 hp with a peak at 9,000 rpm and 49 Nm (36 lb-ft) torque at 7,000 rpm.

The power produced by the engine was handled by a five-speed manual transmission that sent it to the rear wheel through an O-ring sealed final chain drive.

For suspension, the 2004 Yamaha WR450F packed a 46 mm inverted telescopic Kayaba fork on the front with compression and rebound adjustability, offering 300 mm wheel travel. The rear end was handled by a fully-adjustable Kayaba shock absorber with 318 mm wheel travel.

As for the stopping power, the bike had its wire-spoke wheels fitted with a four-piston caliper, a 250 mm disc on the front, and a dual-piston caliper with a 245 mm disc on the rear.