Valve clearances (DR650) STEP-BY-STEP Adjustable valve

Introduction

This tutorial guides you through the process of checking and adjusting valve clearances on a DR650 motorcycle. Understanding how to maintain proper valve clearances is crucial for optimal engine performance and longevity. This step-by-step guide will help you perform this task safely and effectively, ensuring that your bike runs smoothly.

Step 1: Gather Necessary Tools and Materials

Before you start, make sure you have all the required tools and materials ready:

• Socket set
• Torque wrench
• Feeler gauge
• Screwdriver set
• Clean cloths
• Engine oil (if needed for reassembly)

Tip: It’s helpful to have a service manual for your DR650 on hand for specific torque values and specifications.

Step 2: Prepare the Motorcycle

1. Turn off the engine and allow it to cool down completely.
2. Remove the seat and any side panels that obstruct access to the engine.
3. Disconnect the battery to prevent any electrical issues.

Tip: Always work in a well-ventilated area and wear safety gear, including gloves and goggles.

Step 3: Access the Valve Cover

1. Remove the valve cover bolts using a socket wrench. Keep these bolts organized for reinstallation.
2. Carefully lift off the valve cover. You may need to gently tap it if it’s stuck.

Common Pitfall: Be cautious not to damage the gasket during removal. If it looks worn or damaged, consider replacing it.

Step 4: Check Valve Clearances

1. Identify the valves: Locate the intake and exhaust valves on the rocker arm setup.
2. Insert feeler gauges between the valve and rocker arm to measure clearance.
   • For the correct clearance specifications, refer to your motorcycle’s service manual.
3. Record the measurements for future reference.

Tip: If the clearance is outside the specified range, adjustments are needed.

Step 5: Adjust Valve Clearances

1. Loosen the locknut on the adjustment screw of the valve you need to adjust.
2. Turn the adjustment screw to achieve the proper clearance as measured with the feeler gauge.
   • Clockwise will usually decrease clearance, while counterclockwise will increase it.
3. Re-tighten the locknut while holding the adjustment screw in place to maintain the new setting.

Tip: Double-check the clearance again with the feeler gauge after tightening to ensure it hasn't changed.

Step 6: Reassemble the Engine

1. Replace the valve cover gasket if necessary and align the valve cover back onto the engine.
2. Reinstall the valve cover bolts and tighten them to the specified torque using the torque wrench.
3. Reconnect the battery and reassemble any panels or the seat that were removed.

Conclusion

Maintaining proper valve clearances is essential for the performance of your DR650. Regular checks and adjustments can prevent engine wear and enhance your riding experience. If you're ever unsure about the process, don't hesitate to seek professional assistance. Now that you've completed the adjustment, consider scheduling regular maintenance checks to keep your motorcycle in top shape.