5 Pin AC CDI Box for 50cc 90cc 110cc 125cc Dirt Bike Kids ATV Quad Go Kart Buggy

5 Pin AC CDI Box for 50cc 90cc 110cc 125cc Dirt Bike Kids ATV Quad Go Kart Buggy

This 5 pin AC CDI box is an ignition control module that manages spark timing for 50cc to 125cc four-stroke engines used in dirt bikes, kids ATVs, quads, go karts, and buggies.

Overview

This 5 pin AC CDI box delivers the spark signal your small-displacement engine needs to start and run cleanly. It serves riders and mechanics working on 50cc 90cc 110cc 125cc dirt bikes, kids ATVs, quads, go karts, and buggies that use an AC-fired ignition. Swap in this CDI box when the original module fails to fire or cuts out under load.

Built For Performance

• Five-pin connector layout matches common AC CDI wiring harnesses on 50cc to 125cc engines
• Sealed housing resists moisture, dust, and vibration on off-road machines
• Plug-in installation with no rewiring or reprogramming required
• Stable spark timing across the rev range for consistent starting and throttle response
• Compact body fits the factory CDI mounting location on most mini ATVs and pit bikes

Fits These Machines

• for 50cc dirt bikes and pit bikes
• for 90cc kids ATVs and quads
• for 110cc go karts and buggies
• for 125cc dirt bikes and ATV models

On-The-Job Use

• Replacing a failed CDI box on a kids ATV that will not start
• Restoring spark on a pit bike or dirt bike after an ignition fault
• Servicing go karts and buggies used for recreation or light farm work
• Keeping a spare CDI on hand for track days and trail rides

Specs At A Glance

Good To Know

Q: How do I know if my machine uses an AC or DC CDI? A: AC CDI units are common on smaller carbureted engines like these 50cc to 125cc models. Check your original module and wiring before ordering to confirm the pin count and firing type match.

Q: Will this CDI box plug straight into my existing harness? A: It is built to match the standard 5 pin AC connector used on these engine sizes. Verify the plug shape and pin arrangement against your old unit before installation.

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