5 Pins AC CDI Unit Box for 50cc 70cc 90cc 110cc 125cc ATV Quad Dirt Bike Go Kart

5 Pins AC CDI Unit Box for 50cc 70cc 90cc 110cc 125cc ATV Quad Dirt Bike Go Kart

This 5 pin AC CDI unit box is a direct ignition control module for 50cc to 125cc ATV, quad, dirt bike, and go kart engines, replacing the stock CDI to restore consistent spark timing.

Overview

The 5 Pins AC CDI Unit Box is an ignition control module built for 50cc, 70cc, 90cc, 110cc, and 125cc four-stroke engines found in ATVs, quads, dirt bikes, and go karts. It manages spark timing so the engine fires reliably across the rev range. This AC CDI unit box is a practical replacement for riders and mechanics servicing small displacement machines.

Built For Performance

• Five-pin connector layout matching common 50cc to 125cc AC ignition systems
• Sealed housing that resists dirt, moisture, and vibration on off-road machines
• Plug-in installation using the existing wiring harness connector
• Designed for AC-fed ignition circuits on small four-stroke engines
• Compact body that mounts in the stock CDI location

Fits These Machines

• for 50cc ATV and quad models
• for 70cc ATV and quad models
• for 90cc ATV and quad models
• for 110cc ATV, quad, and dirt bike models
• for 125cc ATV, quad, dirt bike, and go kart models

On-The-Job Use

• Replacing a failed or intermittent CDI on a trail ATV
• Servicing youth quad and dirt bike ignition systems
• Rebuilding go kart engines in the 50cc to 125cc range
• Diagnosing no-spark or weak-spark conditions

Specs At A Glance

Good To Know

Q: How do I know if my machine needs an AC or DC CDI? A: AC CDI units draw power from the stator lighting coil, while DC units run off the battery. Check your stock CDI wiring and pin count before ordering.

Q: Will this 5 pin CDI plug straight into my harness? A: It uses the common five-pin connector found on many 50cc to 125cc machines. Compare your existing connector shape and pin arrangement to confirm the match.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.