non adjustable forks with a 14mm hex on top are showa and 41mm on '91 to '93 750ss. the only showa on 900ss were adjustable. marzocchi have a 30 or 32mm hex on top and are 40mm, used on all '94 - '98 600 and 750ss and the 900sscr you guys got. all forks '99 onward (ssie) are 43mm. nut size thing still applies. brad