How fast is the fastest dirt bike?
How fast is the fastest dirt bike?
1. KTM 450 SX-F (198 km/h – 123 mph) – 449cc. The KTM 450 SX-F is best known for propelling Ryan Dungey to Motocross championship. Its powerful 449cc engine is only 237 pounds, but it can power top speeds of 123 mph. Mar 31, 2020
