ESR232 is a high quality and better-than-OEM regulator/rectifier for your Yamaha TT250. We built our ESR232 using the latest technology in regulator circuitry, and use a very efficient heat sink to get rid of the heat quickly and efficiently. ESR232 controls the output voltage very accurately resulting in a perfect charge rate for your battery across the RPM range. Thanks to the modern power circuits our ESR232 runs much cooler than the OEM unit which drastically improves reliability compared to stock. ElectroSport offers our ESR232 with a full one year warranty.