Trail Tech (S-8503 100W Stator DC Electrical System Kit Fits: Yamaha WR250 2003-2005, WR450 2003-2004 Includes: stator, regulator/rectifier; power available for lighting at 3000 rpm : 100 watt Trail Tech stators replace the OEM stator and increase power output significantly Most Trail Tech stators are custom made by Trail Tech, not purchased from bike manufacturers and rewound Since Trail Tech manufactures stators from scratch, a superior level of craftsmanship, performance and value is achieved