The Suzuki Eiger 400 is an all-terrain vehicle (4-wheel motorcycle) from Suzuki. It has a 376 cc, single overhead cam, four-stroke, single cylinder, air/oil-cooled engine, weighs 590 pounds (270 kg), has a 4-US-gallon (15 L) gas tank, and offers two wheel or four wheel drive. There is a choice of a 5-speed semi-automatic transmission with an automatic clutch, or a fully-automatic continuously variable transmission. The CVT transmission model delivers about 17 miles per US gallon (14 L/100 km; 20 mpg_‑imp) for a usable cruising range of about 50 to 60 miles (80 to 100 km) on a tank.

The drive system is a hybrid belt-shaft system. The engine powers the drive belt, which in turn provides the power to the shaft as its final drive train to the axles.

The Suzuki Eiger has a torque-sensing differential in the front on the 4x4 model.