| MODEL | KAWASAKI W3 650 1973 |
| Year | 1973 |
| Engine Type | Four-stroke, parallel twin, OHV |
| Displacement / Capacity | 624 cc / 38 cu in |
| Bore X Stroke | 74 x 72.6 mm |
| Compression Ratio | 9.0:1 |
| Cooling System | Air-cooled |
| Max Power | 39 kW / 53 hp @ 7000 rpm |
| Max Torque | 5.7 kgf-m @ 5500 rpm |
| Ignition | Battery ignition |
| Induction | Mikuni VM31 carburetor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4-speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Steel tube duplex cradle |
| Front Suspension | Telescopic forks |
| Rear Suspension | Swing arm |
| Front Brakes | Mechanical drum |
| Rear Brakes | Mechanical drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | 1415 mm / 55.7 in |
| Ground Clearance | — |
| Dry Weight | 181 kg / 399 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.25-18 |
| Rear Tyre | 4.00-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 15 Litres / 4.0 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The W3 was the 1973 version of Kawasaki's 650 twin, carrying on the W series that began with the W1 and the earlier W2. It kept the same air-cooled overhead-valve parallel twin and conventional steel cradle frame with drum brakes. The W series had struggled in the US because it looked too close to the BSA, but it sold better in Japan.
