YAMAHAWR450F 2006 - 2007

　　The Yamaha WR450F was an off-road motorcycle part of the WR series in Yamaha's range that comprised machines with different engine displacements. The bike was first released in 1998 under the WR400F designation.

　　In 2007, the Japanese manufacturer launched the Yamaha WR450F, an off-road motorcycle that began the fourth generation. The 2007 model brought several technical modifications.

　　The bike had a new aluminum frame with slightly less weight and a revised dry-sump engine that packed a new balancer, cylinder head, and camshafts. In addition, the 2007 Yamaha WR450F came with restyled plastics.

　　In the engine department, the 2007 Yamaha WR450F packed the same 449cc liquid-cooled single-cylinder engine as its predecessors. It delivered an output power of 58 hp with a maximum force at 9,000 rpm and 49 Nm (36 lb-ft) torque at 7,000 rpm.

　　The bike was built on a single-cradle steel frame with a 46 mm inverted telescopic Kayaba fork on the front with compression and rebound adjustability, offering 300 mm wheel travel. The rear end was operated by a fully-adjustable Kayaba shock absorber with 318 mm wheel travel.

　　As for the braking power, the Yamaha WR450F was fitted with a four-piston caliper and a 250 mm disc on the front wheel and a dual-piston caliper with a 245 mm disc on the rear wheel, delivering solid and reliable stopping power.