Twin Power 77-90 XL Primary Chain Adjuster Lining Replaces H-D 39966-80

Keep the proper tension on your primary chain with the Twin Power™ Primary Chain Adjuster Linings.

Twin Power 77-90 XL Primary Chain Adjuster Lining Replaces H-D 39966-80

Constructed for quiet, reliable operation in the primary

Designed as direct replacements for worn OEM linings

Help maintain consistent chain tension over time

Primary Chain Adjuster Lining

Replaces H-D® 39966-80