I have just bought a switch for my 1953 BSA A7 plunger. It is a used original stamped 3 53 so I´m very pleased.

Lucas No. 31281, BSA spare part No. 19-1106.

Can someone please tell me how to fit the switch. I can see the plate and things in the spares catalouge but I don´t understand where to put it.


1953 BSA A7
2006 Triumph Bonneville T100