Press the gear off the camshaft, turn it round, then press it back on again. The teeth only wear on one side. Tip courtesy of the late Denys Wilkinson, former UK Membership Secretary.
36 4G, 37 VH, 54 KH(A), 75 Healey 1000/4, 52/53 ex ISDT KHA (project).
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist once more - but not Machine Registrar.