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  4. PRIMARY CHAIN AUTO TENSIONERS

PRIMARY CHAIN AUTO TENSIONERS

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Category dedicated to automatic primary chain tensioners for Harley-Davidson and American custom motorcycles. These components maintain optimal primary drive chain tension, reducing vibrations, noise, and premature wear on sprockets and gears. Ideal for Evolution, Twin Cam, Milwaukee Eight, Knucklehead, Panhead, Shovelhead, and Flathead engines.

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About this category

Compatible with Sportster, Dyna, Softail, Touring, and Big Twin models. Replace mechanical or spring tensioners, providing constant adjustment with no maintenance. Includes tensioners for OEM and aftermarket primary cases. Improves shifting smoothness and clutch lifespan. Essential spares for restorations and preventive maintenance on classic and modern motorcycles.

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