1987 Yamaha Moto 4 350 Wiring Diagram

If you own a 1987 Yamaha Moto 4 350 ATV, you may need to refer to the wiring diagram to troubleshoot electrical issues. The wiring diagram is a detailed schematic that shows the connections and components in the electrical system. In this article, we’ll guide you through the process of accessing and interpreting the 1987 Yamaha Moto 4 350 wiring diagram.

Accessing the Wiring Diagram

The 1987 Yamaha Moto 4 350 wiring diagram can be found in the service manual or owner’s manual for the ATV. If you don’t have a physical copy of the manual, you can usually find a digital version online. Look for a PDF or downloadable version of the manual that includes the wiring diagram.

Once you have the manual, locate the section that covers the electrical system or wiring diagram. The wiring diagram should be a detailed illustration that shows all the wires and connections in the system.

Interpreting the Wiring Diagram

The 1987 Yamaha Moto 4 350 wiring diagram can be overwhelming at first glance, but with some basic knowledge it’s easy to decipher. Here’s a breakdown of the different components you’ll see on the diagram:

Component Description
Battery The power source for the electrical system
Stator Generates AC electrical power to charge the battery and power the ignition system
Ignition coil Converts the AC power from the stator to high voltage DC power to fire the spark plug
CDI unit Controls the timing and power delivery to the ignition coil
Rectifier Converts the AC power from the stator to DC power to charge the battery
Relay Sends power to various components in the electrical system
Fuse Protects the electrical system from overload
Switch Controls the flow of power to various components

Each wire on the diagram is labeled with a color code and a letter/number code. For example, “B/W” means “black/white.” The letter/number code indicates the specific wire within the color code. For example, “B/W 3” is the third black/white wire.

Use the legend or key provided with the diagram to match the color and letter/number codes to the corresponding components and wires in the system.

Frequently Asked Questions

What should I do if I can’t find the wiring diagram in the manual?

If the wiring diagram is missing from the manual, try contacting Yamaha or a local ATV repair shop. They may be able to provide you with a copy of the diagram.

What should I do if I can’t decipher the wiring diagram?

If you’re having trouble interpreting the wiring diagram, try using a wiring diagram software program or taking the ATV to a professional mechanic for assistance.

What are some common electrical issues in the 1987 Yamaha Moto 4 350?

Some common electrical issues in the 1987 Yamaha Moto 4 350 include a dead battery, faulty stator or regulator/rectifier, malfunctioning ignition system, and corroded or damaged wiring. Refer to the wiring diagram to troubleshoot these issues.

How do I maintain the electrical system in my 1987 Yamaha Moto 4 350?

To maintain the electrical system in your 1987 Yamaha Moto 4 350, regularly check and clean the battery terminals, inspect and repair any damaged or corroded wiring, and follow the manufacturer’s recommended maintenance schedule.

Can I modify the electrical system in my 1987 Yamaha Moto 4 350?

Modifying the electrical system in your 1987 Yamaha Moto 4 350 can be risky and may void the manufacturer’s warranty. If you’re considering making modifications, consult with a professional mechanic or refer to the service manual for guidance.

By understanding and referencing the 1987 Yamaha Moto 4 350 wiring diagram, you can easily troubleshoot electrical issues and maintain the ATV’s electrical system. If you’re unsure about any aspect of the diagram or electrical system, don’t hesitate to seek professional assistance.