Built around Yamaha's custom - cruiser motorcycle platform, the 2012 Yamaha DSC4 DragStar Classic 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 DSC4 DragStar Classic Four measures 247 kg (545 lbs) wet (curb), translating to a power-to-weight ratio of 0.12 HP/kg (8.23 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 2.7 L/100 km provides an estimated theoretical range of roughly 556 km (345 miles) between fill-ups.
Specific Output
75.2 HP/L
Power-to-Weight
0.12 HP/kg (8.23 kg/HP)
Power Band Window
6,000–7,500 rpm
Theoretical Range
~556 km (345 mi)
Engine
Displacement399.0 ccm (24.35 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsV2, four-stroke
Power30.0 HP (21.9 kW)) @ 7500 RPM
Torque31.0 Nm (3.2 kgf-m or 22.9 ft.lbs) @ 6000 RPM
Compression9.7:1
Bore x Stroke68.0 x 55.0 mm (2.7 x 2.2 inches)
Valves/Cylinder2
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionTCI
LubricationWet sump
CoolingAir
Transmission
Gearbox5-speed
Final DriveShaft drive (cardan) (final drive)
ClutchWet multiple
DrivelineConstant mesh
Performance
Fuel Consumption2.70 litres/100 km (37.0 km/l or 87.12 mpg)
Greenhouse Gases62.6 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame TypeDouble cradle
Rake35.0°
Trail145 mm (5.7 inches)
Front SuspensionTelescopic
Rear SuspensionSwing arm
Wheelbase1625 mm (64.0 inches)
Ground Clearance145 mm (5.7 inches)
Wheels & Brakes
Front Tyre130/90-16
Rear Tyre170/80-15
Front BrakesSingle disc
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Weight incl.247.0 kg (544.5 pounds)
Seat Height710 mm (28.0 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
