Our patient! We'll add a short video of the problem in thread, but this is clutch basket from a 1979 Honda CBX that we are restoring. Beneath those 6 rivets there are teardrop-shaped damper rubbers, similar in function to what's used in the rear wheel sprocket cush drive. 40 years later those dampers are shrunken and rock-hard, and so there is play between the driven gear and the basket itself, causing clattery noise and vibration. Yes, "they all do that", but they don't have to! The 80 clutch basket is similar design, but uses 9 of the dampers. Same project.
Step 1, we have to get this thing apart, non-destructively. We have done this in the past using a nice fresh 8mm drill bit and a sharp chisel and that works fine, but you are well advised to carefully centerpunch the soft rivet FIRST. If you get it well centered and use an 8mm drill, add a few drops of oil, and go slow, this is easily done by hand drill without a drill press or a fancy endmill.
Repeat five more times and whack any remaining material off with a sharp chisel, and the steel plate lifts easily off. Now it's apart. That steel top plate that was held by the rivets captures the driven gear. The old hard rubber dampers were removed from those teardrop-shaped splines - they just slide right off, super loose and rock hard.
Step Next is to drive those rivets out with a small punch:
Not shown - 15 minutes with a 6mm x 1.0 spiral flute tap and some TapMagic. Once those rivets are out we have to tap the holes for the screws that we'll use to replace them. Tap all the way through, then blow out any swarf. Test fitting the screws here before assembly, good to go.
Yeah, we vapor blasted it. It's aluminum, it wasn't bolted down, and it fit
. That makes it easier to inspect and we did find some sharp edges on the basket fingers that we smoothed off. Otherwise it's good to go.