How to Change a Spark Plug in a 1987 Yamaha XT350

Maintaining your 1987 Yamaha XT350 is crucial for optimal performance, and changing the spark plug is a key part of that maintenance. Whether you're a seasoned rider or new to dirt biking, this guide will walk you through the process of changing the spark plug on your XT350.

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Tools and Materials Needed

  • Spark plug socket
  • Ratchet wrench
  • New spark plug (NGK DR8ES-L recommended)
  • Torque wrench
  • Anti-seize compound (optional)

Step-by-Step Guide

1. Prepare Your Bike

Ensure your Yamaha XT350 is on a stable surface and the engine is cool to the touch. Disconnect the battery to prevent any accidental electrical shorts.

2. Locate the Spark Plug

The spark plug on the 1987 Yamaha XT350 is located on the right side of the engine. Remove the spark plug cap by pulling it straight off.

3. Remove the Old Spark Plug

Using the spark plug socket and ratchet wrench, carefully unscrew the old spark plug. Turn counterclockwise until it is free. Inspect the old plug for any signs of wear or damage, which can indicate engine issues.

4. Install the New Spark Plug

Before installing the new spark plug, apply a small amount of anti-seize compound to the threads if desired. This helps prevent the plug from seizing in the cylinder head. Carefully thread the new spark plug into the engine by hand to avoid cross-threading.

5. Tighten the Spark Plug

Use the torque wrench to tighten the spark plug to the manufacturer's specifications. For the XT350, this is typically around 18 ft-lbs. Do not overtighten, as this can damage the threads.

6. Reattach the Spark Plug Cap

Once the spark plug is securely in place, reattach the spark plug cap by pushing it firmly onto the plug until it clicks into place.

7. Reconnect the Battery

Reconnect the battery and start the engine to ensure everything is functioning correctly. Listen for any unusual sounds or misfires.

Additional Tips for XT350 Owners

The 1987 Yamaha XT350 is known for its reliability and versatility, but regular maintenance is key to keeping it in top shape. Always use high-quality parts and follow the recommended service intervals. Additionally, check the air filter and oil levels regularly to ensure your bike runs smoothly.

By following these steps, you can easily change the spark plug on your Yamaha XT350 and keep your bike running at its best. For all your Yamaha XT350 parts and accessories, MotoSport has you covered.

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Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.