NEW Voltage Regulator for your Yamaha as listed below.

ID 516293
Unit Type Part
Part Type REGULATOR - EXTERNAL
Dimension 80mm L x 90mm W x 28mm H
Hole Distance 62mm
Brief Yamaha ATV:
Bear Tracker YFM250 230cc 2001-04
Big Bear 250 YFM25B 230cc 2006-09
Big Bear 400 YFM40 386cc 2002-12
Bruin 250 YFM250BT 230cc 2005-06
Bruin 350 YFM35 348cc 2004-06
Grizzly 125 YFM125 124cc 2004-13
Grizzly 350 YFM35 348cc 2007-13
Grizzly 400 YFM4FG 401cc 2007-08
Grizzly 450 YFM45FG 421cc 2007-13
Grizzly 600 YFM600 595cc 1999-01
Kodiak 400 YFM4A 401cc 2000-06
Kodiak 450 YFM450 421cc 2003-06
Raptor 250 YFM25 249cc 2008-13
Raptor 350 YFM350R 2004-13
Raptor 660 YFM660 660cc 2001-05
Wolverine 350 YFM35X 348cc 2006-09
Wolverine 450 YFM45FX 421cc 2006-10
Addl Info: 3-Phase wo/Sensor