How To: Harley Davidson Sportster Carburetor Cleaning

Introduction

Cleaning the carburetor of your Harley Davidson Sportster is essential for maintaining optimal engine performance. A clean carburetor ensures better fuel efficiency and smoother operation. This guide walks you through the process step-by-step, helping you restore your Sportster to like-new running condition.

Step 1: Gather Necessary Tools and Materials

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

• Screwdriver set (flathead and Phillips)
• Wrench set
• Carburetor cleaner spray
• Cleaning brushes (soft and stiff bristle)
• Compressed air canister
• Safety goggles and gloves
• Clean rags or paper towels
• A container for small parts

Step 2: Remove the Carburetor

To access the carburetor, follow these sub-steps:

1. Turn off the Fuel Supply: Locate the fuel petcock and switch it to the off position.

2. Disconnect the Battery: Remove the negative terminal from the battery for safety.

3. Remove Air Cleaner: Unscrew the air cleaner cover and detach the air cleaner element to expose the carburetor.

4. Unfasten Carburetor: Use the appropriate wrench to loosen the bolts securing the carburetor to the intake manifold. Carefully slide the carburetor off.

5. Detach Fuel and Vacuum Lines: Disconnect any fuel and vacuum lines attached to the carburetor, ensuring you remember their positions for reassembly.

Step 3: Disassemble the Carburetor

Once the carburetor is removed, disassemble it carefully:

1. Take Note of Assembly: As you disassemble, take pictures or make notes of how components fit together.

2. Remove Float Bowl: Unscrew the float bowl from the carburetor body and set aside.

3. Take Out the Float and Needle: Carefully remove the float and needle from the carburetor.

4. Remove Jets and Screws: Unscrew and remove the main jet, pilot jet, and any other screws holding internal components.

Step 4: Clean Each Component

Now that the carburetor is disassembled, it’s time to clean:

1. Use Carburetor Cleaner: Spray all components with carburetor cleaner, making sure to cover every surface.

2. Brush Away Deposits: Use the soft bristle brush to gently scrub away any buildup. For stubborn deposits, use the stiff bristle brush.

3. Blow Dry with Compressed Air: Use a canister of compressed air to blow out any remaining debris from small passages and jets.

4. Inspect Parts for Damage: Check all components for wear or damage, replacing them if necessary.

Step 5: Reassemble the Carburetor

Once everything is clean, reassemble the carburetor:

1. Reinsert Jets and Screws: Place the main and pilot jets back into their respective holes and tighten securely.

2. Attach Float and Needle: Reinstall the float and needle, ensuring they move freely.

3. Reattach Float Bowl: Screw the float bowl back onto the carburetor body.

Step 6: Reinstall the Carburetor

Follow these sub-steps to put the carburetor back onto the motorcycle:

1. Reconnect Fuel and Vacuum Lines: Attach the fuel and vacuum lines to their original positions.

2. Position Carburetor: Slide the carburetor back onto the intake manifold and secure it with bolts.

3. Reattach Air Cleaner: Replace the air cleaner element and cover.

4. Reconnect the Battery: Attach the negative terminal back onto the battery.

5. Turn on Fuel Supply: Open the fuel petcock to allow fuel into the carburetor.

Step 7: Test the Engine

After reassembling, start the engine to ensure everything is working correctly:

1. Start the Engine: Turn the ignition on and start your motorcycle.

2. Check for Leaks: Look around the carburetor for any signs of fuel leaks.

3. Test Ride: Take a short ride to check for improved performance and responsiveness.

Conclusion

Cleaning your Harley Davidson Sportster carburetor is a straightforward process that can significantly enhance your bike's performance. By following these steps, you can ensure that your carburetor is free of dirt and debris, allowing your motorcycle to run smoothly. If you encounter any issues during the process, consider consulting a professional mechanic. Happy riding!