CHAIN,PRIM.DRIVE

If you are developing unwanted amounts of transmission snatch, particularly at low town speeds when shutting off and then re-opening the throttle, maybe it is time to replace the primary chain, with a fresh, new part that will tighten up that back-lash, that is so annoying, and potentially damaging.
Take a look at the online catalogue for your model, you may find other items you may need, to complete your transmission overhaul more comprehensively.