The drive package on the Royal Star Venture includes a liquid-cooled (referred to as 1,300 cc) V4 engine fed by four carburetors - one per cylinder - primed by a manually operated push-pull choke. It has four valves per cylinder, overhead camshafts, and shim-over bucket valves. Bore x stroke is 79 x 66 mm (3.11 x 2.60 in) with a compression ratio of 10:1. The five-speed, overdrive transmission is part of the engine case and the engine and transmission share the same oil. The drive shaft and final drive assembly are built into the left side of the double-sided swing arm. Swing arm motion is damped by a mono shock mounted in the center of the frame. The clutch is of the wet plate design and is hydraulically activated by the left hand lever.