Voltage Regulator Rectifier Fit for Honda SH 125 150 2005-2012 / PES 125 150 2006-2012 Features: Direct replacement to your original unit. Plug-and-play, direct fit, easy installation. No assembly required. Higher grade of electric components. Improved heat sink and charging capabilities. The quality exceeds or meet the OEM equipment. All products shipped are tested. Specifications: Condition: Aftermarket 100% New Quanity: 1 PC Type: Voltage Regulator / Rectifier Replacement Part Number: 31600-KTF-641 Fitment: Fit for Honda SH125 2005-2012 Fit for Honda SH150 2005-2012 Fit for Honda UH125 UH125D 2009 Fit for Honda PES125 PS125 2006-2012 Fit for Honda PES150 PS150 2006-2012 (Compatibility Chart is for reference ONLY ) (Please Compare with Your faulty unit and the image we provided to Decide Fitment) Package Includes: 1x Voltage Regulator Rectifier NOTE: Before installing your new regulator rectifier; Check the AC output of the stator. Replace any burned or corroded connectors on stator and regulator/rectifier Check and repair any melted wiring. Use hi-temp dielectric grease on all connectors. How to distinguish CDI box with AC fired or CDI box with DC fired? If headlights turn on without the engine running(with just the key on), it is a DC system. In the AC system, turning headlights on require the engine to be running. Another indication is, if the engine will only runs with a battery it is DC. If it will runs without a battery, it is a AC system. What does the voltage regulator do? This regulator has the task of converting the alternating voltage (AC) generated by the alternator into the direct voltage (DC) 12V used in the vehicle electrical system and keeping the voltage within a certain range. The voltage regulator is also responsible for ensuring that the battery is charged and that the light bulbs do not burn out. How do I know if the charge regulator can be defective? - Incandescent lamps burn out all the time. - Headlights get brighter and darker. - The battery is constantly empty.