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.
| 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 |
| Brakes | Front: hydraulic single disc brake Rear: hydraulic single disc brake |
| Fuel capacity | 3.2 US gal (12 l; 2.7 imp gal) |
Read more about this topic: WR450F, First Generation: WR400F