Motorcycle mileage inductor

A motorcycle mileage inductor installed in the tubular collar of the wheel set of the front wheel of a motorcycle and adapted to detect the amount of rotation of the motorcycle front wheel, comprising:

• a magnetic device holder fixedly fastened to the tubular collar of the wheel set of said motorcycle's front wheel with screws, said magnetic device holder comprising a flange perpendicularly forwardly extending around an inner diameter thereof, said flange having a plurality of notches and a plurality of hooked portions;
• and
• an annular magnetic device mounted said magnet holder magnetic device holder around said flange, said annular magnetic device comprising a plurality of magnets abutted against one another and alternatively arranged in reversed directions, a locating groove extending along an inner diameter and forced into engagement with the hooked portions of said flange of said magnetic device holder, and a plurality of inside ribs respectively engaged into the notches of said flange of said magnetic device holder for enabling said annular magnetic device to be rotated with said magnetic device holder;
• and
• a cover shell affixed to the front fork of said motorcycle and covered over the periphery of the outer end of the tubular collar of the wheel set of said motorcycle's front wheel, said cover shell having a mounting hole, a circuit board mounted in said mounting hole of said cover shell, and a sensor installed in said circuit board for acting against the magnets of said annular magnetic device to detect the amount of rotation of said annular magnetic device with said motorcycle's front wheel and to provide a signal indicative of the amount of rotation of said motorcycle's front wheel to the mileage counter and ABS (anti-locking brake system) of said motorcycle.