Fitment Note: The YM1500 could have 2 possible charging systems. One style uses a regulator with 3 wires and one uses a voltage regulator with 4 wires. Both styles have alternators with two wires and both alternators look the same (though the "3 wire" style generator does often have diodes that are visible from the back) . The difference is the way they are wired. This alternator ONLY WORKS on the style with the 4 wire regulator.
Shop Notes: It is a relatively easy job to switch over from the three-wire to the four-wire style regulator system and, since the "three-wire" style alternator is no longer available, this is a pretty common modification. Please see wiring diagrams below to show the difference. If you are switching over, you must replace the regulator and the alternator together.
