Yamaha Regulator/Rectifier Part # 1D7-81960-01-00 (Shindengen part FH020AA). This came off of a Yamaha Grizzly 700 but is the same part that was used on a number of other Yamaha motorcycles and ATVs including the R1, R6, YZF600, VMAX, Rhino, Raider, Bolt, Viking, Kodiak, Wolverine, FZ1, FZ8...