After a bit of confusion turns out I need a new 4th gear. The one with 48 teeth to maintain the correct ratio. Weddles have none in stock so I have been searching the usual sites to no avail so far. Have tried GoWesty, JustKampers, Tristar Connection, Bernt Jaeger, BusStop, VWHeritage parts. Does anyone have any suggestions? This is an issue for anyone wanting a gearbox rebuild. I don't know when Weddles will have them back in stock.
Peter from Port (on my Trek bike at present which is a lot less fun than a Syncro!!!)