Electrosport Industries Electrosport Regulator/Rectifier ESR318 fits Honda TRX420

This is by far the best regulator rectifier in the world. The Electosport RR design prevents overcharging and dissipates voltage quickly while providing optimum power balance and protection to all of your electrical components. This aluminum die cast heat sink helps remove heat quickly and the slotted mounting holes provide easy installation. Electrosport offers a 1-year warrantyConnector blocks are designed to fit perfectly into the OEM wiring harnessesExclusive slotted mounting provides easy installationAluminum die-cast heat sink wicks excessive heat away quicklyMachine installed wiring connectorsHigh quality protective sheathing keeps wiring tucked neatly away