San-IgniteX Starter Motor for Honda TRX420/TRX500/Pioneer 500 — 12V 9‑Tooth Direct-Fit Replacement, Upgraded Durability

San-IgniteX Starter Motor is a direct-fit, high-durability replacement designed to restore reliable starting performance to Honda TRX420 Rancher, TRX500 Foreman and Pioneer 500 models.

If your ATV or side-by-side stalls on the starter or struggles to crank, this replacement starter motor is built to match Honda OEM fit and function while offering upgraded components for long service life. Engineered as a bolt-on swap for the common Honda part numbers listed, it fits a broad span of model years and is optimized for 12V systems with a 9-tooth drive gear.

Which Honda models and part numbers does this replace?

This starter is made to directly replace the factory units used on many Rancher, Foreman and Pioneer models without modification. Confirm compatibility by matching your vehicle model and the original part number before purchasing.

• Fits Honda TRX420 Rancher (2007–2019)
• Fits Honda TRX500 Foreman (2012–2019)
• Fits Honda Pioneer 500 (SXS500M, 2015–2021)
• Direct replacement for OEM part numbers such as 31200-HP5-601, 31200-HR0-F01, 31200-HN5-M01 and 31200-HN5-671

How does this starter perform compared with the original Honda unit?

The San-IgniteX unit matches the critical mechanical and electrical specifications of the original while using reinforced materials in wear areas. It delivers consistent torque and is endurance-tested for powersports use to reduce premature failure under tough conditions.

• 12V PMDC motor with a 9-tooth drive gear compatible with Honda GX390 starter interfaces
• Delivers approximately 1.9 Nm starting torque suitable for typical ATV cranking loads
• Durability tested for up to 10,000 start cycles to withstand frequent use
• Upgraded carbon brushes and balanced rotor/stator assembly for smooth operation

What should I check before ordering and installing this starter?

Verify electrical system voltage, starter tooth count and physical mounting before purchase. Installation is a direct bolt-on for compatible models, but using professional service avoids damage and ensures correct electrical connections.

• Confirm your vehicle uses a 12V system (this unit is not for 24V setups)
• Ensure the starter has a 9-tooth drive gear to match your transmission pinion
• Relay/solenoid is not included—verify existing relay condition or purchase separately
• Pair with a healthy battery for best cranking performance

How easy is installation and what maintenance helps longevity?

Installation is designed to be a direct replacement with the same mounting points and electrical connections as the OEM part. Routine checks of battery health, wiring, and the starter relay will extend service life and help avoid no-start situations.

• Direct bolt-on replacement — no modifications required
• Professional installation recommended for secure electrical connections
• Inspect wiring harness and ground connections if cranking is weak
• Regularly check battery charge and replace worn relays or corroded terminals

Who is this for: Riders, mechanics and powersports shops needing a dependable replacement starter for Honda Rancher 420, Foreman 500 or Pioneer 500 vehicles will benefit from this part. It’s aimed at owners who want OEM-level fit with improved wear components for routine riding, utility use, or fleet maintenance. If you require a 12V, 9-tooth starter that bolts in place of the listed part numbers and prefer a unit built to withstand frequent starts, the San-IgniteX Starter Motor is engineered for that role.