That video was very good. Thank you. My chain is fine so I need to get the chain shortened as there is no adjustment left.
Thanks all for you help and advice.
Is the axle shaft actually all the way to the back of the slot?? And is there no adjustment at all left? My chain has always seemed on the long side and near the end of adjustment but, that was the way it was made, and it still does adjust with no issue. (It just doesn't need adjustment often at all.)
A long chain is also nice if you want to experiment with sprocket size changes (larger front or rear...)