A highly precise timing gauge + 13 blade feeler necessary to points and spark plug adjustment.
The sensor determines the position of piston and thanks to it adjusting the ignition can be very precise.
Available thread sizes: 10x1; 12x1,25; 14x1,25 and 18x1,5 mm
This device is very useful In adjusting ignitions of a variety of engines (Triumph, Norton, Harley-Davidson, Indian, Simson, NSU, DKW, BMW, AJS, BSA, Zundapp, MZ, Honda, Suzuki, Yamaha, Kawasaki etc.)
The sensor is brand new, in good working order. It has been never used before.

After purchase please tell me what thread size (M10, M12, M14 or M18) do you need!