ESC170 is a brand new source coil that replaces the OEM source coil on the stator plate of the Yamaha PW50 and PW50 Zinger models Our ESC170 is easily installed and only requires soldering two wire leads to tabs on this new coil. It is a very cost effective solution to fix an otherwise very expensive OEM stator plate. Like all ElectroSport parts this ESC170 also comes with a full one year warranty.