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Primary Chain Tensioners

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Primary Chain Tensioners

Transmission Adjuster OEM Style

Transmission Adjuster OEM Style

Reproduction of the original transmission adjuster as used on Big Twins 1936–64.

Transmission Adjuster Custom

Transmission Adjuster Custom

Dual adjuster for 4-speed transmissions 1936-64 (tin primary) and 4-speed transmissions thru 1984 with open primary drives.

Hayden Enterprises M6 Primary Chain Tensioners

Hayden Enterprises M6 Primary Chain Tensioners

This is the right stuff for everybody looking for smooth power transfer instead of noisy “clunk” shifting. Unlike the original setup, the M6 features a spring beneath the adjuster shoe which exerts proper pressure to the chain. With the original chain tensioner the chain - even when adjusted correctly - still has approx. 10 mm slack and exactly this leads to vibrations and hard shifting.

DynaMite Primary Chain Tensioner Spring-loaded

DynaMite Primary Chain Tensioner Spring-loaded

Primary chain tensioner of German CNC manufacture which replaces the original component, however, it is additionally equipped with a spring-loaded damper. The shock absorbing effect of this damper minimizes chain lashing and thus improves the chain’s service life and lowers its running noise. Works in both wet and dry primary housings.

Primary Chain Tensioner for Big Twin

Primary Chain Tensioner for Big Twin

Primary Chain Tensioner Plate for Big Twin

Primary Chain Tensioner Plate for Big Twin

Primary Chain Tensioner for Sportster

Primary Chain Tensioner for Sportster

Springs for Primary Chain Tensioner for Sportster

Springs for Primary Chain Tensioner for Sportster

Adjustable Transmission Base Plates

Adjustable Transmission Base Plates

Precision-machined transmission mounting plate with built-in dual adjusters. Ideal for use with open belt drives. Features three front mounting holes to match early and late frames.

Replacement Parts

Replacement Parts