Segment: Naked / Road
Production years: 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980
The Kawasaki Z1 was a standard motorcycle manufactured by the Japanese maker in 1972. the bike was powered by a four-cylinder air-cooled DOHC engine. The bike helped popularize the in-line, across-the-frame layout of the four-cylinder engine, which soon was known as the Universal Japanese Motorcycle (UJM).
The Kawasaki ZI was the first large-displacement four-cylinder Japanese motorcycle that used the DOHC system on a production machine.
The bike remained unchanged until 1975 when the maker introduced a new 903cc engine with more power. In addition, the 1975 motorcycle received an improved suspension system, a stiffer frame, dropped the automatic chain oiler, revised styling, and an improved braking system.
The bike was built on a double cradle tubular steel frame with a 36 mm telescopic fork handling the front. The rear end was operated by two shock absorbers with five-way preload adjustability.
The braking performance was achieved by a dual-piston caliper with a 296 mm disc on the front wheel and a 200 mm drum braking unit mounted on the rear wheel, delivering optimum braking performance.
As for power, the 1972 Kawasaki Z1 used a 903cc four-stroke four-cylinder air-cooled engine fed by four Mikuni carburetors, delivering an output power of 82 hp with a peak at 8,500 rpm and 73 Nm (54 lb-ft) torque at 7,000 rpm.
The power was handled by a five-speed transmission and delivered to the rear wheel through a final chain drive, pushing the bike to 217 kph (135 mph).
engine specs | Type: | Air cooled, four stroke, transverse four cylinder, DOHC, 2 valves per cylinder | Displacement: | 903 cm3 | Bore X Stroke: | 2.5x2.5 in OR 64 mm | Compression Ratio: | 8.5:1 | Horsepower: | 82/8500 KW(hp)/RPM | Torque: | 54/7000 lb-ft/RPM OR 73/7000 Nm/RPM | Fuel System: | Carburetor |
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transmission specs | Gearbox: | 5 Speed | Clutch: | - | Primary Drive: | - | Final Drive: | Chain |
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chassis specs | Frame: | - | Front Suspension: | Telescopic forks | Rear Suspension: | Dual shocks | Front Brake: | Single disc | Rear Brake: | Drum |
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dimension specs | Overall Length: | - | Overall Width: | - | Seat Height: | - | Wheelbase: | - | Ground Clearance: | - | Weight: | - | Fuel Capacity: | - |
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tyres specs | Front: | 3.25-19 | Rear: | 4.00-18 |
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power system specs | Power pack: | - | Nominal Capacity: | - | Maximum Capacity: | - | Charger type: | - | Charging time (normal): | - | Charging time (quick): | - | Range: | - |
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