How to CV Carburetor: Disassembly, Recording Jets and Settings, Cleaning, and Carb Rebuild Series

How to CV Carburetor: Disassembly, Recording Jets and Settings, Cleaning, and Carb Rebuild Series

How to CV Carburetor: Disassembly, Recording Jets and Settings, Cleaning, and Carb Rebuild Series – on our site you will find the best spare parts and accessories for cars and motorcycles

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How to CV Carburetor: Disassembly, Recording Jets and Settings, Cleaning, and Carb Rebuild Series

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How to CV Carburetor: Disassembly, Recording Jets and Settings, Cleaning, and Carb Rebuild Series

The CV (Constant Velocity) carburetor stands as a pivotal component in the performance of a motorcycle, influencing fuel efficiency, engine response, and overall ride quality. This detailed guide aims to demystify the process of disassembling, recording settings, cleaning, and rebuilding a CV carburetor, ensuring enthusiasts and mechanics alike can enhance their motorcycle’s performance and longevity.

Introduction to CV Carburetor Maintenance

The CV carburetor, with its intricate design and essential role in the engine’s fuel delivery system, demands precise maintenance and understanding. This series will cover the step-by-step process of overhauling a CV carburetor, from initial disassembly to the final rebuild, emphasizing the importance of detailed record-keeping for jets and settings, thorough cleaning techniques, and meticulous assembly procedures.

Disassembly and Recording Jets and Settings

Preparing for Disassembly

Before diving into the disassembly process, it’s crucial to create a conducive work environment. This includes preparing a clean, well-lit workspace and organizing tools and containers for small parts. Taking photographs at various stages can serve as a helpful reference during reassembly.

Disassembly Steps

  1. Initial Inspection: Begin with a visual inspection of the carburetor’s exterior for signs of wear, leakage, or damage. This can provide valuable clues about potential internal issues.
  2. Recording Settings: As you disassemble the carburetor, carefully record the settings of adjustable components such as the air/fuel screw. Noting the position of the pilot jet, needle clip, main jet size, and float height is crucial for reassembly and tuning.
  3. Removing Components: Systematically remove components, starting with external screws and moving inward. Pay special attention to the choke plunger and any vacuum hoses or connections. Ensuring all parts are accounted for and carefully cataloged will streamline the reassembly process.

Cleaning the Carburetor

Importance of Thorough Cleaning

The effectiveness of a carburetor rebuild is significantly influenced by the cleaning process. Residues, varnish, and debris can obstruct fuel passages and affect performance.

Cleaning Techniques

  1. External Cleaning: Use a gentle cleaner to remove grime from the carburetor’s exterior. Avoid high-pressure air or water that could drive contaminants into internal passages.
  2. Internal Cleaning: Soak disassembled parts in a carburetor-specific cleaner, followed by careful brushing with soft-bristled brushes to remove stubborn deposits. Compressed air can be used to blow through passages, but with caution to prevent damage.
  3. Inspection and Replacement: Inspect all parts for wear or damage. Replace any defective components, especially rubber parts like gaskets and o-rings, to ensure a proper seal during reassembly.

Rebuilding the Carburetor

Reassembly Tips

  1. Consult the Service Manual: Always refer to the manufacturer’s service manual for specific instructions and torque specifications.
  2. Jets and Needles: Install jets and needles according to the recorded settings. Ensure all components are correctly oriented and seated.
  3. Float Height Adjustment: Accurately setting the float height is critical for proper fuel level management within the carburetor.
  4. Final Checks: Before completing the rebuild, double-check all connections and settings. Ensure there are no loose parts or tools left in or around the carburetor.


Rebuilding a CV carburetor is a meticulous process that can significantly enhance a motorcycle’s performance and efficiency. By carefully disassembling, cleaning, and reassembling the carburetor, while paying close attention to the recording and adjustment of jets and settings, enthusiasts can ensure their bike runs smoothly and reliably. This guide aims to provide a comprehensive overview of the process, empowering riders with the knowledge to maintain and optimize their carburetors for peak performance.


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How to CV Carburetor: Disassembly, Recording Jets and Settings, Cleaning, and Carb Rebuild Series

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