Built around Kawasaki's custom - cruiser motorcycle platform, the 2018 Kawasaki Vulcan 900 Classic pairs a 903 cc (55.1 cu in) liquid-cooled v2, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 48 HP (35 kW) at 5,700 rpm while maximum torque reaches 77 Nm (56.8 lb-ft) at 3,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and belt final drive. With a specific output of 53.2 HP per liter and a 2,200 rpm working window between peak torque (3,500 rpm) and peak power (5,700 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the Vulcan 900 Classic measures 281.1 kg (620 lbs) wet (curb), translating to a power-to-weight ratio of 0.17 HP/kg (5.86 kg per horsepower). Rider ergonomics and chassis geometry center around a 680 mm (26.8 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,646 mm (64.8 in) wheelbase engineered for planted straight-line stability. The 20-liter (5.3 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Kawasaki archive, this model family spans 20 indexed model years from 2006 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
53.2 HP/L
Power-to-Weight
0.17 HP/kg (5.86 kg/HP)
Power Band Window
3,500–5,700 rpm
Standover Height
680 mm (26.8 in)
Engine
Displacement903.0 ccm (55.10 cubic inches)
Engine TypeV2, four-stroke
Engine Details52° V-twin
Power48.0 HP (35.0 kW)) @ 5700 RPM
Torque77.0 Nm (7.9 kgf-m or 56.8 ft.lbs) @ 3500 RPM
Compression9.5:1
Bore x Stroke88.0 x 74.2 mm (3.5 x 2.9 inches)
Valves/Cylinder4
Fuel SystemInjection. DFI with dual 34mm Keihin throttle bodies
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionTCBI with digital advance
LubricationForced lubrication, wet sump
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveBelt (final drive)
ClutchWet multi-disc
DrivelineKevlar-reinforced belt
Chassis
Frame TypeSemi-double cradle, high-tensile steel
Rake32.0°
Trail160 mm (6.3 inches)
Front Suspension41mm hydraulic telescopic fork
Front Travel150 mm (5.9 inches)
Rear SuspensionUni-Trak swingarm, 7 way adjustable spring preload
Rear Travel103 mm (4.1 inches)
Wheelbase1646 mm (64.8 inches)
Ground Clearance135 mm (5.3 inches)
Wheels & Brakes
Front Tyre130/90-16
Rear Tyre180/70-15
Front BrakesSingle disc. Hydraulic. Two-piston calipers.
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.
