The top speed of a 250cc Yamaha dirt bike varies depending on the specific model and engine specifications. For example, the Yamaha YZ250F motocross bike has a top speed of approximately 80-85 miles per hour, while the Yamaha WR250R dual-sport bike has a top speed of around 75-80 miles per hour.
Additionally, factors such as terrain, rider weight, and modifications to the bike can affect the actual top speed achieved.
