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CVP Mixture Screw Packing

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Replacement packing for use with the EZ-Just mixture screw or stock mixture screw. Includes the Viton® o-ring, washer, and spring that can be lost when removing the original mixture screw. These repack parts are a CVP exclusive and not available from the factory.

Fits Harley Keihin 'Butterfly' and CV style carburetors 1981-2006.

This packing kit has also been successfully used on many CVK40, CVK36, and CVK34 carburetors.*

Note that in areas now using Ethanol as a 10% fuel additive, replacing the original rubber o-ring under the mixture screw with a Viton® o-ring can prevent possible failure. Early factory o-rings will not withstand added Ethanol or other fuel additives for extended periods. CVP was the first to offer the original mixture packing kit and also the only company to use the higher quality Viton® o-ring. Be aware that other components used in motorcycle fuel systems are not designed to be used with fuel exceeding 10% Ethanol. It is recommended to avoid using E85 fuel on carbureted Harley motorcycles.

*CV Performance has only tested the mixture packing kit on early Harley butterfly, CV40, CVK40, and select CVK36 carburetors. Successful use on other Keihin CVK models is not guaranteed in all circumstances and therefore not covered under our return policy.

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Product Reviews

Showing reviews 1-4 of 31 | Next

  1. A Perfect Fit

    Posted by on

    Good quality parts!

  2. Perfect Fit!

    Posted by on

    Replaced the OEM miniature a/f screw with the EZ Screw and purchased this just in case. I ended up replacing the OEM spring, washer and o-ring. Everything fit prefect and works great!

  3. Quality Replacement

    Posted by on

    Worth replacing these parts when rebuilding your carb or changing the idle mixture screw to the EZ-Just.

  4. Worth every penny

    Posted by on

    Save yourself the hassle of future problems and just replace these often neglected components with every carb overhaul. The stock O-rings harden into a little rings of cement over time and eventually fail to seal. They're also difficult to remove when they get that bad, so do yourself a favor and replace them as a matter of course, rather than as a matter of necessity. You'll be glad you did.

Showing reviews 1-4 of 31 | Next

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