| MODEL | KAWASAKI GPZ 1100-B1 1981 |
| Year | 1981 |
| Engine Type | Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder |
| Displacement / Capacity | 1089 cc / 66.4 cu in |
| Bore X Stroke | 72.5 x 66 mm |
| Compression Ratio | 8.9:1 |
| Cooling System | Air cooled |
| Max Power | 81 kW / 108 hp @ 8000 rpm |
| Max Torque | 95.1 Nm / 70.2 lb-ft @ 7000 rpm |
| Ignition | Electronic, CDI |
| Induction | Bosch electronic fuel injection |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Steel cradle design |
| Front Suspension | Telescopic coil/air spring forks; 138 mm / 5.4 in travel |
| Rear Suspension | Swinging arm with 2 dampers adjustable for preload and damping; 99 mm / 3.9 in travel |
| Front Brakes | 2x 270 mm discs, 1-piston calipers |
| Rear Brakes | Single 270 mm disc, 1-piston caliper |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 780 mm / 30.8 in |
| Wheelbase | 1540 mm / 60.6 in |
| Ground Clearance | — |
| Dry Weight | 237.3 kg / 521 lbs |
| Wet Weight | 255 kg / 562 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.25-18 |
| Rear Tyre | 4.25-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 21.4 Litres / 5.5 US gal |
| Fuel Consumption | 38.8 mpg |
| Top Speed | 220 km/h / 137 mph |
The 1981 GPz1100 was Kawasaki's large air-cooled superbike and its first 1,100 cc model, using Bosch electronic fuel injection on a 1,089 cc, two-valve-per-cylinder four derived from the Z1000. Its chassis had a steel cradle frame, coil/air forks and a swingarm with twin adjustable dampers. The source calls it one of the most powerful fours of its year, though it is heavy and high-seated.
