I am aware of the year of my frame and I am aware of the year of my engine (vastly different) but I am curious as to if the year of my gearbox can be identified, I know that the shape of the gear box, or possibly only the lugs changed when the swinging arm frame came about, Is it the fact that since the inception of the SA frame. circa 54/5 all the subsequent gearboxes were interchangeable? Do they have numbers stamped on them somewhere to allow dating?
Thanking you in anticiation..