2025 Kawasaki Vulcan S Tourer Technical Analysis & Specification Breakdown
At the heart of the 2025 Kawasaki Vulcan S Tourer touring motorcycle, Kawasaki utilizes a 649 cc (39.6 cu in) liquid-cooled twin, four-stroke layout. In factory specification, peak output is rated at 59.9 HP (43.8 kW) at 7,500 rpm while maximum torque reaches 62.4 Nm (46 lb-ft) at 6,600 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 92.3 HP per liter and a 900 rpm working window between peak torque (6,600 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 Vulcan S Tourer measures 229 kg (505 lbs) wet (curb), translating to a power-to-weight ratio of 0.26 HP/kg (3.82 kg per horsepower). Rider ergonomics and chassis geometry center around a 705 mm (27.8 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,575 mm (62 in) wheelbase engineered for planted straight-line stability. The 14-liter (3.7 US gal) fuel tank paired with a rated consumption of 4.5 L/100 km provides an estimated theoretical range of roughly 311 km (193 miles) between fill-ups.
Within MotoLibrary's Kawasaki archive, this model family spans 5 indexed model years from 2020 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
92.3 HP/L
Power-to-Weight
0.26 HP/kg (3.82 kg/HP)
Power Band Window
6,600–7,500 rpm
Theoretical Range
~311 km (193 mi)
Engine
Displacement649.0 ccm (39.60 cubic inches)
Engine TypeTwin, four-stroke
Power59.9 HP (43.8 kW)) @ 7500 RPM
Torque62.4 Nm (6.4 kgf-m or 46.0 ft.lbs) @ 6600 RPM
Compression10.8:1
Bore x Stroke83.0 x 60.0 mm (3.3 x 2.4 inches)
Valves/Cylinder4
Fuel SystemInjection. DFI with two 38mm throttle bodies, with sub-throttles
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionDigital
LubricationForce lubrication, semi-dry sump
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet multi-disc
DrivelineSealed Chain
Performance
Fuel Consumption4.50 litres/100 km (22.2 km/l or 52.27 mpg)
Greenhouse Gases104.4 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame TypeTubular diamond, high-tensile steel
Rake31.0°
Trail120 mm (4.7 inches)
Front Suspension41mm telescopic fork
Front Travel130 mm (5.1 inches)
Rear SuspensionOffset laydown single-shock, linkage equipped, with 7-way adjustable preload
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.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
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.
