I got the 102mm mini Nippondenso single V-groove pulley from like a Chevy Sprint 1985-88 in the junkyard. But the part number 31400-83010 corresponds to a Suzuki Samurai 1.3L 1986-1989, Chevy Sprint 85-88, Suzuki Swift 84-89 and possibly others. It seems to come in 45, 55, 60 amp versions from rebuilders. Mine tested fine at the parts store. It is the same physically as powermaster p/n 8122/8128 6.78 lbs. 102 mm. ( http://www.powermastermotorsports.co...ternators.html ) The stock ones are not one wire like the powermaster ones. But they have an internal regulator.