Originally Posted by
diff
I guess I'll order a new cog, probably should get a new chainring too? Thanks for the help.
It's unnecessary to order new stuff. You already know that the "play" comes from the chain tension, just learn to deal with it.
It's better to feel the play than not having any play when you back pedal/track stand; tight chain tension will eat up your drive train really fast.
If your master link is 3/32" then you can use it on a 8/9 speed chain, otherwise it'll be too loose.