Hand/Foot application method:
Take said hunk of flat iron plate/healthy screwdriver shaft; go under the trans area and force the trans to the rear wheel. Go to the belt drive and push on the top of the drive belt and watch the trans move toward the engine. Ear at Wrinkled Wanker's Cycle Shack, we step on a lot a'shit, let alone our ball's dragging the ground, tripping over the Sven Sack Lingo.
Hand/Foot does not matter, choose either app, it's the method used to now go over to the swing arm area. Note the pivot point of the swing to frame. Belt this area the same, but kick the rear tire in the one direct. Did the rear belt at the top rung do what ? Say you started with the left side kick/push of hand, the top rung drops, right? If you kicked to the belt side, right side says belt rises. Ear me out here at Wanker's Sack Shack, Sven the dick farmed out the rear end to us so say the engine didn't move, trans didn't move, swing bearings showed no movement.
Back to engine drive belt. Push the whole clutch outer basket to the rear wheel. Watch top belt rung rise. Push outer basket to the engine, watch top rung drop. You figure engine is quiet, no complaint when riding normally so rule out engine bearings, right? I'd say, if it's not a bearing, not a bolt, whathell is left?