If you are an enthusiastic motorbike user, you must have heard of Chinese CDI (capacitor discharge ignition) units. These units are commonly used in Chinese motorcycles and scooters. However, one of the biggest challenges that motorbike users face is the malfunctioning of CDI units. To avoid this, it is crucial that you understand how to wire them properly. In this article, we will guide you on how to wire Chinese CDI units correctly.
What is a Chinese CDI Unit?
A Chinese CDI unit is an electronic ignition system that is designed to provide a high voltage spark to the engine at the right time. This, in turn, ignites the fuel-air mixture, causing the engine to run. The CDI unit consists of a capacitor, a trigger coil, and an ignition coil. The capacitor stores the energy, the trigger coil signals the capacitor to release the energy, and the ignition coil amplifies the energy before it is sent to the spark plug.
As mentioned earlier, Chinese CDI units are prone to malfunctioning. This is usually due to wiring issues or incorrect wiring. It is, therefore, essential to understand the wiring diagram to ensure that the CDI unit is working correctly.
Chinese CDI Wiring Diagram
There are different types of Chinese CDI units, each with a distinct wiring diagram. However, most CDI units have similar wiring diagrams. Below is a typical Chinese CDI wiring diagram.
| Color | Description |
|---|---|
| Black | Ground wire |
| Red | Battery positive (+) wire |
| Green | Trigger (pickup) wire from stator |
| Yellow | Ignition (high tension) wire to spark plug |
| Blue/White | Kill switch wire |
| Blue/Yellow | Ignition coil negative (-) wire |
| Blue/Red | Cdi power wire to ignition coil |
Wiring the CDI Unit
To wire the CDI unit, you will require a few tools such as a multimeter, wire strippers, electrical tape, and a soldering iron. Below are the steps to follow:
Step 1: Disconnect the Battery
The first step is to disconnect the battery to prevent electric shock.
Step 2: Identify the Wires
You need to identify the wires as shown in the wiring diagram above. Use a multimeter to test for continuity between the wires.
Step 3: Connect the Wires
Connect the wires according to the wiring diagram. Ensure that the wires are securely connected and covered with electrical tape to prevent moisture from getting into the connections.
Step 4: Test the CDI Unit
Before you reconnect the battery, test the CDI unit using a multimeter to ensure that it is working correctly.
Step 5: Reconnect the Battery
Once you have verified that the CDI unit is working correctly, reconnect the battery.
Frequently Asked Questions (FAQs)
Q1: Can I use a different CDI unit on my Chinese motorbike?
A1: Yes, you can use a different CDI unit, but you need to ensure that it is compatible with your motorbike’s make and model.
Q2: What causes a CDI unit to malfunction?
A2: A CDI unit can malfunction due to wiring issues, incorrect wiring, or faulty components such as capacitors and coils.
Q3: How can I diagnose a faulty CDI unit?
A3: You can diagnose a faulty CDI unit by checking the voltage output from the trigger coil and ignition coil using a multimeter.
Q4: How can I test my CDI unit?
A4: You can test your CDI unit using a multimeter to measure the voltage output from the trigger coil and the ignition coil.
Q5: How can I fix a faulty CDI unit?
A5: You can fix a faulty CDI unit by identifying the faulty component and replacing it. Alternatively, you can replace the entire CDI unit.
In conclusion, wiring Chinese CDI units may seem complicated, but with the right guidelines, you can do it correctly. Remember to follow the wiring diagram provided, and before you reconnect the battery, test the CDI unit to ensure that it is working correctly.
