picture this: while bike is sitting with no load on seat, pull up on rear of bike and there is a clunk, I traced it to the rear shock mounting. So I replaced the rear shock bearings and bushings, upper mount bolt and nut. The clunking is still there. If you place your hand on the top shock mount you can feel movement, but only when pulling up on the bike. I didn't notice any abnormal wear in the area of the frame or bearing/bushing bore when I had the shock out. Any ideas?