MINI Electronic Tachometer with Black Interface for Harley-Davidson and Custom Motorcycles MINI Electronic Tachometer with Black Interface This high quality mini tack measures 1-7/8" in overall diameter (1-3/4" face) and 2" long. Custom gauge style. Polished steel. It comes with chrome mounting clamp and wiring diagram. Will fit any 2 cylinder 4 strokes motorcycle or a custom project. *Product ID = 56