Electronic Speedometer Recalibration ModuleThis module allows you to recalibrate OEM electronic speedometers when changing tire size, pulley, or final gearing. Easy installation simply plugs in between the pickup sensor and the stock wiring harness. Allows small step corrections of less than 1 mph. Correction range of 50% to 200%. No power required to maintain calibration when the bike is parked. Two sealed buttons allow easy resetting of the speedometer reading while the bike is in motion. A