My 1993 model had push fit ones, nothing welded? Pair of grips and some gentle, even easing around the circumference before giving them a good tug and off they came. Much easier to fit the belts now.
Yup, that's what mine were like on a 1993 900ss. Never bothered trying to refit them for real, for the reasons you give, but I did just try a refit to see if you could and yes you can. Perhaps if you really, really wanted to you could flatten in a vice and use some locktite, but why bother once they're off for the grief it might cause?