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1975 Kawasaki KZ/Z1 900

Purchase Date: Spring 1996 
PictureThe only photo in existence.
I was driving a tired V45 Honda Magna and my father was sitting on a 1975 Kawasaki KZ/Z1 900 that he wasn't driving much. One day he randomly offered me a straight up swap: bike for bike. I couldn't refuse the offer; I'd been admiring the Kawasaki for some time.

The 1975 Kawasaki KZ/Z1 900 has an air cooled 903 cc engine with a bore x stroke of 66 x 66 mm and a compression ration of 8.5:1. The Kawasaki power-plant produces 82 hp @ 8,500 rpm with a torque of 54.3 ft/lbs @ 7,000 rpm. Maximum speed is 132 mph. Braking is poor for modern times with a single disc in front and drum at the rear. The KZ has a dry weight of 506 lbs. The fuel tank capacity is 4.49 gallons.

The Kawasaki was unique due to the fact that it had the engine from a '74 Z1 900 and the rolling frame from a '75 KZ 900. The bike was modified for short distance speed runs. Modifications that my father and I completed:

Paint: Jet black paint with several layers of clear coat and polishing.

Coils: Dynatek high performance coils.

Ignition: Dynatek electronic ignition replacing the points plate.

Air Cleaner: K&N air filter pods.

Exhaust: MAC full 4 into 1 exhaust, purchased from a local salvage yard. Fiberglass packing had been removed with the muffler insert still installed. This gave the appearance of a packed muffler to pass inspections, although it was practically a straight (loud) megaphone pipe.

Sprockets: Modified sprocket gearing.

Handle Bars: Straight drag bars.

Miscellaneous: High performance spark plug wires, carburetor re-jetting, Continental tires, new battery, king and queen style seat, new chain, rear shock lowering kit.

The KZ was fast in the straights after the modifications. The motorcycle sounded like thunder coming down the street (I miss that sound). Top speed after the gearing was only about 75-80 mph before pushing the limit of the rpms. The bike didn't handle or corner well. It was low, fast and mean.

I drove the Kawasaki from Pennsylvania to California in 1997. I relocated with the few items I could carry on back of the motorcycle. I had my share of problems driving cross country on the bike but it was all capable of being repaired on the side of the road. After arriving in California, I didn't have the tools of garage to repair the Kawasaki to the fullest and was forced to sell the bike for a more reliable motorcycle. I have many personal, fond memories of the KZ; we've been through a lot together.

Sale Date: Fall 1997 
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  • Home
    • About Rusted Chrome
    • Contact Rusted Chrome
  • Motorcycles "Current"
    • 1970 Norton Commando 750 Roadster
    • 1973 Yamaha TX650
    • 1978 BMW R100S
    • 1984 Moto Guzzi 850T5
    • 2015 Moto Guzzi Griso 1200 8V SE
    • 2022 Husqvarna Norden 901
  • Motorcycles "Past"
    • AJS >
      • 1953 AJS 18S
    • BSA >
      • 1968 BSA B25 Starfire
    • BMW >
      • 1974 BMW R60/6
      • 1985 BMW K100RS
      • 2000 BMW R1100S
    • Ducati >
      • 1999 Ducati 900SS
      • 1999 Ducati 996
    • Moto Guzzi >
      • 1968 Moto Guzzi V700
    • Gilera >
      • 1966 Gilera 106SS
    • Harley Davidson >
      • 1974 Harley Davidson XLH 1000
      • 2008 Harley Davidson Street Bob FXDBI
    • Honda >
      • 1962 Honda Dream CA77 305
      • 1969 Honda CB350
      • 1974 Honda CL360
      • 1984 Honda Magna VF750C V45
      • 1986 Honda VFR 750F
      • 1992 Honda CBR 600F2
      • 2001 Honda CBR 929RR
    • Kawasaki >
      • 1975 Kawasaki H1 500 Mach III
      • 1975 Kawasaki KZ/Z1 900
      • 1978 Kawasaki KZ650
      • 1979 Kawasaki KZ400-B2
      • 1980 Kawasaki KZ1000
      • 2001 Kawasaki ZRX 1200R
    • MG >
      • 1974 MG MGB GT
    • Suzuki >
      • 1989 Suzuki Katana GSX750F
      • 1992 Suzuki Bandit GSF400
      • 2001 Suzuki SV650S
    • Triumph >
      • 1965 Triumph TR6SR
    • Yamaha >
      • 1980 Yamaha XS650
      • 1981 Yamaha DT175
  • Blog