A forged piston features a bridge-box design for maximized strength with minimal weight.

The YZ250F features a large-diameter 15-plate clutch to withstand the high demands of motocross racing.

Handlebar-mounted switchbox allows on-the-fly selection between two preloaded engine maps with the push of a button.

New for 2026, an industry-first ECU lock function helps prevent theft and unauthorized engine start-up.

An updated Launch Control System controlled through the Power Tuner App optimizes launches when the gate drops.

A three-level Traction Control System selectable within the Yamaha Power Tuner App maintains ideal rear wheel traction.

Yamaha's industry-leading Power Tuner App allows owners to tune air/fuel mixture and ignition timing to suit their preference.

An innovative exhaust pipe design improves mass centralization and power characteristics.

The optimized intake path boosts mid- to high-rpm performance and improves over-rev characteristics.

The adjustable fuel injection system uses a 44mm throttle body to ensure optimum fuel atomization and air/fuel calibration.

The piston, rings and DLC-coated piston pin, along with the offset cylinder configuration, all reduce friction loss.

The YZ250F's 250cc four-stroke engine is renowned for its broad, useable power and class-leading low-end and mid-range torque.