shamofeng Starter Motor Kit for Polaris ATVs & Rangers — 12V PMDD, 9-Tooth Pinion, Includes Bendix & Relay

shamofeng Starter Motor Combo Kit replaces your worn starter, bendix and solenoid relay to restore reliable cranking for compatible Polaris ATVs and UTVs.

If your Polaris ATV or Ranger won’t turn over or is slow to crank, this shamofeng starter kit provides a full replacement solution in one box. Designed to match common OEM fitments and interchange numbers, the kit includes the motor, a Bendix drive and a starter solenoid relay so you can swap the complete starting system without sourcing parts separately. The unit is a 12V PMDD (permanent magnet direct drive) motor with a 9-tooth CW pinion and comes ready for bolt-in installation on many Polaris Sportsman, Scrambler, Magnum, Big Boss and Ranger models from the mid-1990s through early 2000s.

Will this starter kit fit my Polaris ATV or UTV?

Check your vehicle model and year against the listed fitment details before purchasing. The kit covers a broad range of Polaris models including Sportsman 500 series, Scrambler 500, Magnum 325/425/500, Big Boss 500 6x6 and multiple Ranger variants across model years 1995–2002. Also compare OEM and interchange part numbers to ensure compatibility.

• Sportsman 500 series (1996–2002), Sportsman 400 (2001–2002), Sportsman 335 (1999–2000)
• Magnum 325/425/500 (1995–2002), Scrambler 500 (1997–2002), Big Boss 500 6x6 (1998–2002)
• Ranger 425 2x4 (2001–2002), Ranger 500 4x4 and 6x6 (2001–2002 and 1998–2002)
• Cross-reference OEM 3084981 and interchange numbers 18645, 18645N, 57-2688, 410-54020, SMU0061

How simple is installing this starter, bendix and relay?

The shamofeng kit is designed as an OEM-fit replacement to minimize modification or fabrication. In most cases installation is straightforward with basic hand tools and follows the factory removal steps: disconnect the battery, remove the old starter and solenoid, transfer any brackets if necessary, and bolt the new components into place. If you’re comfortable with basic mechanical work, this is a plug-and-play swap; otherwise a shop can complete it quickly.

• Designed to meet or exceed OEM shape and mounting points for bolt-on fit
• Includes starter motor, Bendix drive, and starter solenoid relay in one kit
• Standard 12V electrical connections—no special adapters required
• Recommended: disconnect battery and follow factory torque specs

What are the technical specs and reliability features?

The starter uses a 12V permanent magnet direct drive motor with a 9-tooth clockwise pinion, engineered for quick, quiet starts. Components are selected to withstand typical ATV/UTV operating conditions; the Bendix provides proper engagement with the flywheel while the included solenoid ensures consistent power switching. This combination reduces the need to mix-and-match parts and helps prevent future incompatibility issues.

• 12V PMDD motor with 9 teeth, clockwise rotation
• Includes premium Bendix drive for secure gear engagement
• Starter solenoid relay supplied to complete the starting circuit
• Manufactured to interchange with common OEM part numbers

When should I choose a full combo kit instead of a single part?

If your starter system shows signs of wear—intermittent cranking, slow engagement, or noisy starts—a complete kit reduces the chance of repeat repairs from neighboring failing components. Buying the motor, Bendix and solenoid together saves time and often money compared with ordering parts separately, and gives you spares to keep on hand for future maintenance. It’s especially practical for older machines where multiple components may be near end of life.

• Avoids repeated tear-downs by replacing motor, drive and relay together
• Cost-effective for older Polaris vehicles likely to need multiple replacements
• Good option for DIYers and shops who prefer one comprehensive repair kit

Who is this kit for? The shamofeng Starter Motor Combo Kit is aimed at Polaris owners, mechanics and maintenance shops servicing model years listed above who want a complete, OEM-interchange replacement for failed starters. It suits people fixing older ATVs and UTVs who prefer a single-box solution that restores starting function quickly, and those who want a spare starter assembly and components on hand for off-season upkeep.