The STS Parts Voltage Regulator Rectifier is a premium 12-volt replacement for Kawasaki Jet Ski models using part numbers 21066-3712, SH565-12, and various compatible rectifier types. Designed for excellent charging performance, this marine-grade regulator restores proper voltage regulation, preventing battery drain, weak charging, and electrical issues. Built with improved heat sink design and upgraded electronic components, this rectifier offers stable output across the entire RPM range. It withstands demanding watercraft environments including heavy wave impact, heat cycles, moisture, and vibration. Compatible With the Following Kawasaki PWC Models: 750 ZXi / 750 SS / XI / Xi Sport / XiR – 1992–1998 900 ZXi – 1995–1997 900 STS – 2001–2002 900 STX – 1997–2006 1100 ZXi – 1996–2003 1100 STX – 1997–1999 JT1200 STX-12F – 2004–2007 JT1500 STX / Ultra / LX Series – 2007–2014 (models include Ultra 250X, 260X, 260LX, 300X, 300LX, 310R, 310X, 310LX) This unit is a plug-and-play replacement and matches OEM dimensions for quick installation. Package Includes: 1× Voltage Regulator Rectifier (12V)