44mm Fuel Injection System

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

Adjustable Launch Control

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

Bridge-Box Forged Piston

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

Broad-Power 250cc Engine

The YZ250FX's 250cc four-stroke engine is renowned for broad, useable power and class-leading low-end and mid-range torque.

Centrally-Mounted Electric Starter

A compact, centrally-mounted electric starter system simplifies starting and minimizes restart delays for added convenience.

ECU Anti-Theft Lock

An ECU lock function through the Power Tuner App helps prevent theft and unauthorized engine start-up.

Four-Level Traction Control

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

Handlebar Map Switchbox

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

Heavy-Duty 15-Plate Clutch

The YZ250FX features a large-diameter 15-plate clutch to withstand the extreme demands of cross country racing.

High-RPM Power Components

Intake ports, cam profiles, high-strength connecting rod and optimized crank combine to produce potent high-rpm power.

Low-Friction Piston Assembly

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

Mass-Centralizing Exhaust Design

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

Power Tuner App Connectivity

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

Simple Tuning Slide Bar

A “Simple Tuning” slide bar simplifies engine mapping within the Power Tuner App.

Wide-Range Six-Speed Transmission

A six-speed transmission ensures the right gear is available for the wide variety of terrain found in cross country racing.