AJS/Matchless/Velocette/Ariel/Norton/Royal Enfield Speedo Drive 2:1
AJS/M. Rigid 1937-1950
also can be used f. other Models-need larger hole. Hole diameter 16 mm
If mounted on rear wheel - right hand side- output drive forwards on top- the cable turns clockwise
If mounted on front wheel --left hand side- output drive upwards-the cable turns anticlockwise
This can be used for WM20, but it depends, which speedo is fitted, clockwise or anticlockwise.