Erchon 5-Piece Ignition & Electrical Kit for Polaris Sportsman 90 (2001–2007) — Coil, Regulator, Relay, Spark Plug

Complete 5-piece ignition and electrical replacement kit for Polaris Sportsman 90 (2001–2007) and compatible Predator/Scrambler models—includes coil, box, voltage regulator/rectifier, starter relay/solenoid, and spark plug for reliable starting and stable charging.

When an older ATV shows intermittent starting, weak spark, or electrical charging issues, replacing multiple related components at once prevents repeat troubleshooting and gets you back on the trail faster. This Erchon kit bundles the key ignition and charging parts matched to common Polaris small-ATV part numbers so you replace the likely sources of trouble in one repair session.

What exactly is included in this five-piece replacement kit?

The kit combines the main ignition and charging components you would normally replace separately. Each part is intended as a direct-fit replacement for the listed Polaris models and part numbers.

• Ignition coil: supplies the high-voltage spark to the plug for combustion.
• Ignition box (control module): coordinates timing and spark delivery.
• Voltage regulator/rectifier: converts alternator output to stable battery charging voltage.
• Starter relay/solenoid: routes power to the starter when you engage the starter switch.
• Spark plug: new plug to complete the ignition circuit after coil replacement.

How does this kit improve starting and engine response?

Worn coils, failing control boxes, and weak spark plugs are common causes of hard starts or sputtering. Swapping the entire set removes those variable failure points, restoring consistent spark and ignition timing for smoother starts and steadier throttle response.

• Restores reliable high-voltage output from the ignition coil.
• Eliminates faulty timing or misfires from an aging control box.
• Ensures a fresh spark plug gap and electrode for predictable combustion.

Will the voltage regulator/rectifier and relay protect my ATV’s electrical system?

The included regulator/rectifier moderates alternator voltage to safe levels, while the starter relay safely handles high current to the starter motor. Together they reduce the risk of overcharging or electrical strain and improve charging reliability.

• Prevents voltage spikes that can damage battery and electronics.
• Improves battery charging consistency under varied RPMs.
• Provides a dependable high-current switching path for the starter.

Is this kit compatible with my Polaris model and which part numbers does it replace?

This Erchon replacement kit is specified for small Polaris ATVs from the early 2000s and replaces several common OEM numbers used on those models. Always cross-check with your VIN or service manual to confirm fit before installation.

• Compatible models include: Polaris Sportsman 90 (2001–2006), Predator 50 (2004–2006), Predator 90 (2003–2007), Scrambler 50 (2001–2003), Scrambler 90 (2001–2002).
• Replaces box numbers 0451018 and 0452187; regulator/rectifier 0452061 and 0450553; starter relay/solenoid 0450555.
• Includes one of each component for a complete system refresh.

Who is this for? This kit is aimed at DIY mechanics, small shop technicians, and ATV owners who want a consolidated, cost-effective repair package for older Polaris youth and entry-level ATVs. It’s ideal if you’re troubleshooting intermittent starting, weak charging, or suspect multiple failing electrical components—replacing the entire ignition and charging group at once reduces diagnostic time and helps prevent follow-up failures.