the screws holding the alternator came loose damaging the outer threads
put a new rear inner tube in
and when I got the tyre back noticed what was left of the nail still in the tyre
the gearbox sprocket seal was leaking too - and the spacer was worn , metal shavings in the box?
had to tap a deeper thread for the alternator screws
used longer bolts to hold the cycle electrics alternator
28 year old alternator
fitted a 'big fix' gear box nut has a seal - we'll see…