Upgrade your Polaris ATV's starting system with this heavy-duty starter drive assembly. Engineered for superior performance, this CCW (counterclockwise) drive features 17 teeth and a robust roller & reduction gear design. With precise specifications including a 1.535-inch outer diameter gear and 3.598-inch overall length, this component ensures reliable engagement every time. The drive assembly incorporates a 40T drive gear with 54.5mm outer diameter, making it perfectly compatible with Mitsuba starters on various Polaris ATV and UTV models including 250, 300, 350, 400, and 500 series. Weighing 1.32 pounds, this durable Bendix drive assembly is built to withstand demanding off-road conditions. The precision-engineered construction provides smooth, consistent starting performance while maintaining excellent durability. This replacement part matches OEM specifications for a direct fit on compatible vehicles, ensuring proper function and longevity.