WORKS ON THE FOLLOWING BIKES: CB350 TWINS 1968 TO 1973 CL350 1968 TO 1973 CB450 K1 TO K7 / 68 TO 74 CL450 K2 TO K7 / 68 TO 74 CB500 TWIN'S 1975 TO 1976 ONLY REPLACES OEM NUMBERS 31700-455-671 * 31701-459-751