The play you are describing is also an indication of worn sprockets and it's easier to describe as an ability to rattle the chain halfway around the sprocket rather than trying to lift it off. I'm sorry if I appeared a little difficult there Exuptoy, I had a pretty good idea of what you were trying to say (although I'm still mystified as to how the weight comes into it) it's just it wasn't that obvious, but as you're new on here I should have been easier on you...... Welcome aboard by the way........
