Kawasaki EX500 (GPZ500S) 1987 - 99 and ER500 (ER-5) 1987-99 Haynes Service and Repair Manual 2nd (second) Revised Edition by Ahlstrand, Alan, Haynes, J. H. published by Haynes Manuals Inc (1993): Amazon.com: Books
1992 Kawasaki GPZ 500 S specifications and pictures