How to Adjust Adjustable Pushrods on a Harley Davidson for Optimal Performance and Power

Have you ever noticed your Harley Davidson not running as smoothly as it should? Maybe you’ve felt that little extra vibration or heard some unusual noises. If so, it might be time to adjust those adjustable pushrods.

Key Takeaways

• Understanding Adjustable Pushrods: These components are essential for controlling valve movement in your Harley Davidson, impacting overall engine efficiency and performance.
• Importance of Proper Adjustment: Incorrectly adjusted pushrods can cause serious engine issues, including valve chatter and increased wear, emphasizing the need for regular checks and adjustments.
• Essential Tools: Key tools for pushrod adjustment include a metric socket set, feeler gauge, adjustable pushrod tool, and a torque wrench to ensure accuracy and prevent damage.
• Step-by-Step Adjustment Guide: Proper preparation, measurement, adjustment, and rechecking are crucial steps to successfully adjust pushrods and maintain engine performance.
• Identifying Common Issues: Be vigilant for signs of incorrect pushrod adjustment, such as loud noises, poor performance, and vibrations, and know the steps for troubleshooting these problems.
• Refer to the Service Manual: Always consult your Harley Davidson’s service manual for specific instructions and measurements, ensuring adjustments align with manufacturer standards.

Understanding Adjustable Pushrods

Adjustable pushrods play a crucial role in a Harley Davidson’s performance. They allow for precise control over valve movement, which impacts engine efficiency and power delivery.

What Are Adjustable Pushrods?

Adjustable pushrods are components within your Harley’s valve train. They connect the rocker arms to the engine’s valves. Unlike standard pushrods, these can be lengthened or shortened. This adjustability helps maintain optimal valve clearance and lash settings during engine modifications. You can customize them based on your specific engine build or if you’ve changed components, like camshafts.

Importance of Proper Adjustment

Proper adjustment of pushrods ensures your engine runs smoothly. Incorrectly adjusted pushrods can lead to issues like valve chatter or even engine damage. Maintaining the right length minimizes wear on engine components and optimizes performance. You’ll notice improvements in throttle response and overall power if adjustments are made correctly. Regular checks and adjustments can help extend the life of your engine, so keeping these in check is vital for consistent performance.

Tools Required for Adjustment

Adjusting the pushrods on your Harley Davidson requires specific tools to ensure accuracy and efficiency. You’ll need the right equipment to facilitate proper adjustments and avoid common pitfalls.

Essential Tools

• Socket Set: A metric socket set, including a torque wrench, ensures accurate fitting and tightening of bolts.
• Screwdrivers: Flathead and Phillips screwdrivers assist in removing and installing necessary components.
• Feeler Gauge: A feeler gauge helps measure the gap between parts precisely, crucial for pushrod adjustment.
• Pliers: Needle nose pliers enable you to manipulate small components and hold various parts in place during adjustment.
• Magnetic Tray: Keeping small parts organized becomes easier with a magnetic tray, preventing loss during disassembly.

• Adjustable Pushrod Tool: An adjustable pushrod tool simplifies the process by allowing you to set the correct length for optimal clearance.
• Torque Wrench: Using a calibrated torque wrench ensures that you apply the right amount of force when tightening bolts, preventing overtightening or damage.
• Service Manual: Your specific Harley model’s service manual provides essential specifications and procedures, streamlining the adjustment process.
• Shop Towel: Keep shop towels on hand to clean up any spills and maintain a tidy workspace during your project.
• Safety Glasses: Don’t forget to wear safety glasses to protect your eyes from debris while working on the engine.

Having these tools readily available makes adjusting your Harley’s pushrods more straightforward and maintains optimal engine performance.

Step-by-Step Guide to Adjustment

Adjusting adjustable pushrods on your Harley Davidson enhances performance and prevents engine issues. Follow these steps for a successful adjustment.

Preparing the Motorcycle

1. Secure the Bike: Use a motorcycle stand or lift for stability.
2. Disconnect the Battery: Avoid electrical shorts during the adjustment process.
3. Remove Necessary Components: Take off any parts obstructing access to the pushrods, like the gas tank or cam cover.

Measuring Pushrod Length

1. Use a Feeler Gauge: Measure valve clearance with a feeler gauge to determine the proper length.
2. Consult Your Manual: Refer to the service manual for specifications on pushrod length specific to your Harley model.
3. Record Measurements: Keep a record of the measurements for accurate adjustments.

Adjusting the Pushrods

1. Locate the Adjustable Pushrods: Identify each pushrod connected to the rocker arms and valves.
2. Loosen the Lock Nut: Use a wrench to gently loosen the lock nut on the pushrod.
3. Turn the Pushrod: Adjust the pushrod to the desired length based on previous measurements.
4. Re-tighten the Lock Nut: Once set, secure the lock nut without over-tightening.

1. Re-check Valve Clearance: Use the feeler gauge again to ensure proper clearance.
2. Run the Engine: Start the motorcycle and listen for abnormal sounds, ensuring everything operates smoothly.
3. Inspect for Leaks: Check around the pushrods and any reattached components for oil leaks.

Following these steps maintains optimal engine performance and prevents potential damage, ensuring your Harley runs like new.

Common Issues and Solutions

Adjusting pushrods on your Harley can lead to common issues if not done correctly. Identifying these problems and implementing solutions helps keep your motorcycle running smoothly.

Signs of Incorrect Adjustment

• Loud Noises: If you hear excessive clattering or tapping from the engine, it likely indicates too much clearance in the pushrods.
• Poor Performance: Noticeable engine hesitation, loss of power, or a rough idle signals the need for pushrod adjustment.
• Overheating: If your engine runs hotter than usual, improper pushrod adjustment may restrict oil flow to critical components.
• Vibrations: Increased vibrations while riding can be a sign that the pushrod length isn’t set correctly.

• Double-Check Measurements: Re-measure pushrod length using your feeler gauge. Make sure to refer to your service manual for the correct specifications.
• Inspect Pushrods: Look for wear or damage on the pushrods. Replace any damaged rods to prevent further issues.
• Clearance Re-Check: After adjustments, confirm the valve clearance again to ensure it’s within the optimal range.
• Listen Carefully: After running your engine, closely listen for any unusual sounds. If noises persist, reassess your adjustments.
• Consult the Manual: Refer to your Harley Davidson service manual for manufacturer-specific guidance and troubleshooting insight.

Conclusion

Adjusting your Harley’s pushrods can make a world of difference in how your bike performs. By taking the time to ensure everything’s set just right you’re not just enhancing performance but also protecting your engine from potential damage.

Remember to keep an eye on those pushrods and check them regularly. Listening for any unusual sounds and staying on top of maintenance will help keep your ride smooth and enjoyable.

With a little patience and care you’ll keep your Harley running at its best for years to come. Enjoy the ride and the satisfaction that comes from knowing you’ve done it right!

Frequently Asked Questions

What are the signs that my Harley Davidson motorcycle is running poorly?

Common signs include increased vibrations, unusual noises, poor throttle response, and overheating. If you notice any of these symptoms, it may indicate issues with the engine or pushrods.

Why are adjustable pushrods important for my Harley?

Adjustable pushrods play a crucial role in controlling the valve movement, which directly impacts engine efficiency and power delivery. Properly adjusted pushrods help prevent valve chatter and potential engine damage.

How do I measure pushrod length using a feeler gauge?

To measure pushrod length, use a feeler gauge to measure the valve clearance while the engine is cold. This helps determine the right length for your adjustable pushrods, ensuring optimal performance.

What should I do if my Harley has loud noises after pushrod adjustment?

If you notice loud noises after adjusting the pushrods, double-check your adjustments and measurements. Inspect the pushrods for wear or damage, and consult the Harley Davidson service manual for troubleshooting guidance.

How often should I check or adjust my Harley’s pushrods?

Regular checks and adjustments are essential, especially after any engine modifications or at least every 5,000 miles. This helps maintain consistent engine performance and extends the engine’s lifespan.

Can incorrect pushrod adjustments lead to engine problems?

Yes, incorrect pushrod adjustments can result in issues like poor performance, overheating, loud noises, and vibrations. Proper adjustment is vital for smooth operation and to prevent potential damage to the engine.