Starter Drive Polaris ATV UTV Big Boss Scrambler XPress ATP Magnum Sportsman Trail Boss Worker XPlorer New Aftermarket Part (Not Rebuilt/Refurbished/Repurposed) This is a Brand New Drive Bendix for Polaris, Many Applications, Part# SMU5003, SM1329850, 3085394 Fits: Big Boss 250 6X6, Big Boss 300 6X6, Big Boss 400 6X6, Big Boss 500 6X6, Big Boss 500 6X6 INT'L, Big Boss 500 6X6 Norweigen, Big Boss 500 6X6 Swedish, Trail Boss, and Many Others OEM(s): Mitsuba, PolarisClutch Type: Roller & Reduction GearGear Teeth: 17Gear OD: 39mm / 1.535inRotation: CCWSplines Type: Not ApplicableOverall Length: 91.4mm / 3.598inWet Clutch Seal?: NoNotes:40T Drive Gear,Drive Gear 54.5mmOD Please verify this is the right part number before ordering