DS4 DragStar Four

2012 Yamaha DS4 DragStar Four Technical Analysis & Specification Breakdown

Engineered by Yamaha for the custom - cruiser motorcycle segment, the 2012 Yamaha DS4 DragStar Four pairs a 399 cc (24.4 cu in) air-cooled v2, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 30 HP (21.9 kW) at 7,500 rpm while maximum torque reaches 31 Nm (22.9 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and shaft drive (cardan) final drive. With a specific output of 75.2 HP per liter and a 1,500 rpm working window between peak torque (6,000 rpm) and peak power (7,500 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the DS4 DragStar Four measures 234 kg (516 lbs) wet (curb), translating to a power-to-weight ratio of 0.13 HP/kg (7.8 kg per horsepower). Rider ergonomics and chassis geometry center around a 710 mm (28 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,625 mm (64 in) wheelbase engineered for planted straight-line stability. The 15-liter (4 US gal) fuel tank paired with a rated consumption of 2.56 L/100 km provides an estimated theoretical range of roughly 586 km (364 miles) between fill-ups.