When Kawasaki unveiled the Z1 in late 1972, it instantly redefined what a production motorcycle could be. The company had originally intended to lead the four cylinder revolution with a 750, only to be beaten to market by Honda’s CB750. Kawasaki responded by going bigger, creating the 903cc Z1 with double overhead cams, which was a first for a mass produced four cylinder road bike. With 82 horsepower on tap, the result was one of the fastest motorcycles of its day, setting records at Daytona and capturing the imagination of riders worldwide.
The Z1 combined sheer speed with surprising civility. Cycle World’s 1973 road test praised it as one of the quickest production bikes available, while also noting its smoothness, flexible power delivery, and comfortable long distance manners. Features such as the robust 8-plate clutch, smooth shifting 5 speed transmission, and a frame designed with ample gusseting made it more than just a straight-line missile. Braking was handled by a single front disc backed up by a large rear drum, while the suspension offered stability at speed and adjustability for touring comfort.
Styling was equally influential, with the teardrop fuel tank, upswept four into four exhaust, and assertive stance giving the Z1 a look that remains iconic today. It was praised not only for its performance but also for its finish, reliability, and everyday usability. Early models like the 1973 Z1 remain highly sought after, representing the starting point of Kawasaki’s Z bike lineage, and a milestone in motorcycle history.
This example is VIN: Z1F06432.
The odometer shows 10 miles. The bike is a full restoration, so it is True Mileage Unknown.
Maintenance:
In preparation for the listing, the seller had us perform a safety inspection. We also rebuilt and sync’d the carbs, fitted a new air filter, replaced the tachometer bulbs, fitted a new horn, replaced the seat latch mechanism, replaced the head gasket, generator cover gasket, valve cover gasket and grommets, exhaust gaskets, and adjusted the valve clearances:
Exhaust .005″ .005″ .005″ .004″.
Intake .003″ .003″ .004″ .003″.
Our service department notes the following on their condition report:
Gas Tank Internal Condition: OK
Engine Oil Level: OK
Engine Oil Quality: OK
Front Hydraulic Fluid Level: OK
Front Hydraulic Fluid Quality: OK
Rear Hydraulic Fluid Level: N/A, Cable
Clutch Hydraulic Fluid Level: N/A
Final Drive Condition: OK
Headlight High Beam: OK
Headlight Low Beam: OK
Parking Light: N/A
Turn Signals: OK
Tail Light: OK
Brake Light (Front Switch): OK
Brake Light (Rear Switch): OK
Plate Light: OK
Horn: Ok
Kill Switch: OK
Brake Pad % Remaining Front: 95%
Brake Pad % Remaining Rear: DRUM
Forks: OK
Shock/s: OK
Tire Date Code Front: 24/16
Tire Date Code Rear: 41/17
Tire % Remaining Front: 100%
Tire % Remaining Rear: 100%
Tire Press. Front: 29 PSI
Tire Press. Rear: 29 PSI
Battery Standing Voltage: 12.6V
Charging Voltage @ 4k RPM: 13.4V
Running Condition: Ok, runs on bench
Test Ride Completed: Yes
Test Ride Distance: 3.2 Miles, unit operates as designed
Notes:
RECENTLY RESTORED (see photo album)
Modifications:
The seat installed is from an alternate year Z1.
Inside of the tank:
It is riding on Dunlop Gold Seal K70 tires that have aged out with date codes of 2416 and 4117.
The sale includes one key.
Cosmetic Blemishes: please see the album in the “Photos” tab for all known cosmetic blemishes. Here is a selection:
Currently located in Panorama City, California, (please make an appointment for an inspection) this Kawasaki is offered on a clean California title with registration currently on PNO.
Do you have any Z1 stories or questions about this listing? Let us know in the “Comments” tab!
