"Models covered: CB650Z. 626cc. UK November 1978 to February 1982; CB650 SC Custom/Nighthawk.. 626cc. UK February 1982 to February 1984; CB650Z. 626cc. US January 1979 to December 1979; CB650 A. 626cc. US January 1980 to December 1980; CB650 CA Custom 626cc. US October 1979 to December 1980; CB650 B. 626cc. US January 1981 to December 1981; CB650 CB Custom. 626cc. US January 1981 to December 1981; CB650 C. 626cc. US January 1982 to December 1982; CB650 SC Nighthawk. 626cc. US October 1981 to December 1982."