Kawasaki Z1 & Z900: 1972 to 1976 (Essential Buyer's Guide Series) by David Orritt (2013): Amazon.com: Books
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Kawasaki Z1, Z/KZ900 & Z/KZ1000: YOUR Step-By-Step Colour Illustrated Guide to Complete Restoration. Covers Z1, Z1A, Z1B, Z/KZ900 and Z/KZ1000 Models 1972-1980 (Enthusiast's Restoration Manual): Rooke, Chris: 9781787111585: Amazon.com: Books
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Kawasaki 900 Super Four Z1 - Digital illustration-like photobook of famous motorcycles in the world vol,1, Nakata, Fumiya, Nakata, Fumiya, eBook - Amazon.com
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Super Four: 1973 Kawasaki Z-1 - Motorcycle Classics