2025 Yamaha YZ250F’s Horsepower and Torque | Dirt Rider

Dyno testing Yamaha’s 250F motocross bike for horsepower and torque.

Since 2014, Yamaha’s YZ250F has been known for its strong engine package. Not coincidentally, that was the same year the Tuning Fork brand reversed the cylinder head on its 250cc four-stroke motocross bike and gave it electronic fuel injection (EFI). Since that pivotal year, the bLU cRU has racked up countless shootout victories, which is due in large part to its impressive mill in a segment where rankings are based heavily on engine output.

Related: How To Get the Yamaha YZ250F and YZ250FX To Start Quickly

How much power does Yamaha’s YZ250F produce in 2025? Pulls on Dirt Rider’s dyno show peak figures of 38.3 hp and 18.0 lb.-ft. of torque.

“With no changes, it’s no surprise that the 2025 Yamaha YZ250F engine delivers on all expectations,” test rider Allan Brown said. “The Tuning Fork brand’s advancements over the past few years have given it a freer-revving and lighter feel, benefiting chassis handling and ease of changing gears. This engine revs far enough that second and third gears are all you need for most courses, even an AMA National track like Fox Raceway. This significantly reduces the amount of shifting required.”

Related: 2024 Dirt Rider 250F Motocross Bike Comparison Test