Starter motor with specifications: 12V voltage, counterclockwise rotation, 14 teeth.Designed to fit OEM part numbers 31100-40B01, 31100-40B00, 21163-S003, 18332.Compatible with models LT80-CS90, SM10230, SMU0033, SMU0225, SMU0277, 410-54009, C0230-NA, ME0230-NA, 78921, 78921N, 137N, RS41185, 91-26-2030, 242-05101, MS-817, 111922, SA-101, SA-101AM, 495712, 49-5712.Suitable for use on ATV LT80 QuadSport from 1987 to 2006 and ATV KSF80 KFX 80 from 2003 to 2006.