110cc ATV CDI Wiring Diagram

When it comes to the electrical system of your 110cc ATV, the CDI – or Capacitor Discharge Ignition – plays a vital role in ensuring that your engine runs smoothly. The CDI unit controls the timing and spark of your ATV, which is essential for starting it up and keeping it running reliably.

What is a CDI?

A CDI is an electronic ignition system that stores an electrical charge in a capacitor, which is then discharged to create a spark in the engine’s combustion chamber.

The CDI contains a series of electronic components that work together to control the timing and intensity of the spark, based on the input it receives from sensors and switches throughout the ATV.

Wiring Diagram Basics

Before we dive into the specifics of the 110cc ATV CDI wiring diagram, it’s important to understand some basic concepts about wiring diagrams in general.

A wiring diagram is a visual representation of the electrical circuitry of a system. It shows the various components and their connections, and how the electrical current flows through the circuit.

Wiring diagrams are typically drawn using symbols and color codes, which can vary depending on the specific application or industry. They are an essential tool for troubleshooting and repairing electrical problems.

110cc ATV CDI Wiring Diagram

Now that you have a basic understanding of wiring diagrams, let’s take a look at the 110cc ATV CDI wiring diagram. This diagram shows the connections between the CDI unit, battery, ignition switch, starter relay, and other components of the electrical system.

Color Code Component Connection
Black CDI Unit Ground
Red Battery Positive (+)
Red/Black Stripe Starter Relay Control Positive (+)
Yellow CDI Unit Pickup Coil Signal
Green CDI Unit Ignition Coil Signal
Blue/White Stripe Ignition Switch Positive (+)

It’s important to note that the specific connections and color codes may vary between different models and manufacturers of 110cc ATVs. Always check the owner’s manual or wiring diagram for your specific ATV before attempting any repairs or modifications.


What is the function of the CDI?

The CDI controls the timing and intensity of the spark that ignites the fuel in the engine’s combustion chamber, ensuring that the engine runs smoothly and reliably.

What are some common symptoms of a faulty CDI?

Some common symptoms of a faulty CDI include difficulty starting the engine, poor performance, and intermittent or inconsistent spark.

Can a faulty CDI be repaired?

In some cases, a faulty CDI can be repaired by a professional electronics technician. However, in many cases it may be more cost-effective to replace the unit with a new one.

How can I troubleshoot CDI problems?

To troubleshoot CDI problems, first check the connections and wiring to ensure that they are clean and secure. You can also use a multimeter to test the output of the CDI unit and other components of the electrical system.

Can I replace the CDI myself?

If you have some basic knowledge of electrical systems and wiring, you may be able to replace the CDI yourself. However, if you are not confident in your abilities, it’s always best to seek the help of a professional mechanic or technician.