ESG809 is a high quality stator that replaces the stock 15 pole OEM stator on Yamaha R1 from 2009 to 2013. Our ESG809 is built on a modern stator core and only the highest grade copper wire is used for the windings. All windings are installed using modern computer controlled winding equipment to ensure the highest possible quality and perfect winding tightness. ElectroSport then installs high quality lead wires that offer very chafe and temperature resistant insulation, the best quality rubber seals, insulation coatings and connectors to make this ESG809 a plug in replacement stator. The ultra high magnetic conductivity of the core material coupled with the low resistance in the reconfigured winding results in the very high efficiency that this stator offers. It also means that this stator runs very cool which drastically improves reliability. The winding configuration has been specially developed for this model to keep the temperature down and still allow for a perfect output across the wide RPM range. Our ESG809 stator offers superior performance and reliability compared to the OEM stator. Like all stators manufactured by ElectroSport this ESG809 also comes with a full one year warranty.