Haynes Honda CB650 SOHC Fours 1978-1984 Owners Workshop Manual 665 Nighthawk
169 pages. The 1981-on CB650, CB650 C and CB650 SC Models. Honda CB650 SC Nighthawk 626cc (US October 1981 to December 1982). Honda CB650 Z 626cc (UK November 1978 to February 1982). Honda CB650 SC Custom/Nighthawk 626cc (UK February 1982 to February 1984).