You should be able to peen the rivet over and take up the side play. Lay it on a flat metal surface and use the ball end of a ball pein hammer. Use light strokes and check the play frequently. Stop when it's tight enough that the hooks can't overlap but are still free to move easily.
2015 BMW R9T, 2010 Ducati 1098 Streetfighter S
2009 Kaw 650 Versys, 1967 Triumph 650 TT Special