A big, 90 cubic-inch, liquid-cooled V-twin engine provides the Drifter with modern cruiser performance. High compression and aggressive cam timing provide the healthy power output, while each cylinder features a single overhead cam actuating four valves. Hydraulic valve lash adjusters reduce maintenance.

The big cylinders breath through the dual 36mm throttle bodies of a Mitsubishi digital fuel injection system. A separate intake tract for each throttle body provides smooth engine operation, and the tip of each injector contains four nozzles, with two of those aimed at each intake valve. The system "brain" uses readings from sensors that monitor engine coolant temperature, intake air temperature, atmospheric pressure, intake air pressure and throttle position to adjust the amount of fuel delivered. The result is excellent engine response and power with enhanced fuel efficiency.

The Drifter's five-gallon fuel tank incorporates an electronic speedometer for a clean, sleek look and includes an LED display for the odometer and tripmeter, as well as the clock.

Starting is made easy via an automatic fast-idle system. The pilot can simply turn the key and push the starter button to get the engine roaring and keep it rumbling smoothly during warm-up. The fast-idle knob can be utilized for extremely cold weather or high altitude starts.