| YZ250-F | |
| Manufacturer: | Yamaha Motor Company |
| Production: | 2001-present |
| Class: | Motocross |
| Engine: | 249cc single-cylinder, water-cooled, four-stroke, DOHC |
| Power: | 39hp[1] |
| Torque: | 21 ft·lbf |
| Transmission: | 5-speed |
| Suspension: | KYB |
| Brakes: | disc (front,back) |
| Tires: | 80/100-21, 100/90-19 |
| Wheelbase: | 57.8 inches |
| Length: | 85 inches |
| Width: | 32.5 inches |
| Height: | 51.2 inches |
| Seat Height: | 38.7 inches |
| Dry Weight: | 204lb |
| Fuel Capacity: | 1.6 Gallons (2024 Model) |
| Related: | Yamaha YZ450F Yamaha WR250F |
The Yamaha YZ250F is a motocross motorcycle first released in 2001 by Yamaha. It features a DOHC, four-stroke engine and initially had a steel frame and subframe in 2001-2002. In 2003 it received an aluminum subframe, which was replaced in the 2006 model with an all-aluminum frame.
The YZ250F has been praised for combining the broad-power characteristics of a four-stroke engine with the light handling more common in smaller, 125 cc two-stroke motorcycles.[2]
Despite the similar name to the YZ250, very few parts have been shared between the models through their history.
| 2003 | Automatic decompression exhaust cam | |
| 2006 | Aluminium frame | |
| 2008 | New engine | |
| 2010 | New engine layout, with lower center of gravity | |
| 2014 | Rear slant cylinder, 4-Valve head, Fuel Injection | |
| 2019 | Electric starter |