Honda C90

There are two of these, both later 12v 85cc bikes. The red one is an  '88 electric start & is almost ready for its MOT. The blue one is in daily use, or was, & is a later bike, '99. It's Krys' ride to work, until today, that is, when I noticed that the rear swing arm pivot was quite badly worn, the pivot bolt was difficult to remove, when it finally came out, we saw how badly the hole in the frame had worn. Particularly, on the left side, where it was worn oval... an over-tight chain at some point in the past, perhaps? Not quite sure how we're going to sort that out but I'm sure we'll think of something!