Hello im in the process of sorting out a 349 cota gearbox (would guess mid seventies bike). The owner took it apart but got the shims wrong and as such only had 1st and 3rd gears. I have the montesa manual but its vague about the shims, especially the sizes. does anyone know the specs of the shims (width/diameter etc) or can work them out from the montesa part numbers?

Thanks for your help!

Can take pics if you know them by looking no measuring.

I can't remember the shim positions but Sandifords should be able to help. BTW buy the gasket set. The spacing in the Mont gearbox is critical.