Yamaha WR450F - First Generation: WR400F - 1998-2000

1998-2000

Yamaha introduced the WR400F in 1998. The 400F is a four-stroke off-road motorcycle produced for three years, beginning in 1998 and ending in 2000 (only the YZ was upgraded to 426 cc in 2000). The WR400F is related to the YZ400F, a motocross model. Like the YZ400, it was considered to be a groundbreaking model in motorcycle history, ushering in the four-stroke era which ended the dominance of two-stroke engines in motocross and offroad racing. While many modern performance four-stroke dirt bikes have been criticized for excessive rebuild costs and short motor lifespans, the Yamaha WR400F has an impressive record of reliability, often attributed to its steel valves and generous oil capacity.

First generation
Production 1998-1999
Successor WR426F
Engine 400 cc (24 cu in) single-cylinder, water-cooled, four-stroke, DOHC five valves
Transmission 5-speed
Suspension

Front: Kayaba inverted fork; fully adjustable

Rear: single shock; fully adjustable
Brakes Front: hydraulic single disc brake
Rear: hydraulic single disc brake
Fuel capacity 3.2 US gal (12 l; 2.7 imp gal)


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