The foundation of Kawasaki’s full-size industrial-grade utility vehicle line, the two-wheel drive Mule™ 4000 is a step up in cargo and towing capacity from the compact Mule 600 series, thanks to its full-size chassis and a more powerful engine, now equipped with digital fuel injection (DFI). The Mule 4000 also features a fully-automatic transmission, locking rear differential and a tilting cargo bed.

For 2009, the new Mule 4000 is powered by a liquid-cooled 617cc four-stroke V-twin. Managed by a digital Electronic Control Unit (ECU), its DFI system compensates for variations in atmospheric pressure, engine and air temperature. This helps make engine starting smoother and more consistent, gives better throttle response and its improved fuel metering helps reduce fuel consumption. The system incorporates an automatic fast idle speed control, which activates when the engine is cold, eliminating the need for a manual choke. The system also regulates maximum engine speed, eliminating the need for a mechanical governor.
The Mule 4000 utilizes a continuously variable transmission (CVT) to provide quick acceleration and efficient pulling power. Dependable, low-maintenance shaft drive transfers power to a dual-mode differential that can be locked to maximize rear-wheel traction, or unlocked to improve handling and minimize ground disturbance when making tight turns.

In addition to an accurate, light-steering rack-and-pinion system, the easy-to-operate controls on the Mule 4000 are positioned to maximize comfort and convenience. The gear selector is located on the dash, within easy reach. The coolant temperature warning light is easy to see and the headlights are activated by a convenient push-button switch. Instrumentation also includes an hour meter, and horn. The Mule 4000 also has a convenient air restriction gauge to indicate when the air filter needs to be cleaned or replaced, and its fuse box and oil dipstick are easily accessed, thanks to their under seat location.