Engineered by Kawasaki for the allround motorcycle segment, the 1965 Kawasaki W1 features a 624 cc (38.1 cu in) air-cooled twin, four-stroke configuration. In factory specification, peak output is rated at 52.3 HP (38.2 kW) at 6,500 rpm while maximum torque reaches 55 Nm (40.6 lb-ft) at 5,900 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 83.8 HP per liter and a 600 rpm working window between peak torque (5,900 rpm) and peak power (6,500 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 W1 measures 181 kg (399 lbs) dry, translating to a power-to-weight ratio of 0.29 HP/kg (3.46 kg per horsepower). The 15-liter (4 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 140 km/h (87 mph).
Within MotoLibrary's Kawasaki archive, this model family spans 5 indexed model years from 1965 to 1969, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
83.8 HP/L
Power-to-Weight
0.29 HP/kg (3.46 kg/HP)
Power Band Window
5,900–6,500 rpm
Engine
Displacement624.0 ccm (38.08 cubic inches)
Engine TypeTwin, four-stroke
Engine DetailsTwin, four-stroke
Power52.3 HP (38.2 kW)) @ 6500 RPM
Torque55.0 Nm (5.6 kgf-m or 40.6 ft.lbs) @ 5900 RPM
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.
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.
