Hydraulic Primary Chain Tensioner

York chain tensioner features a hydraulic valve which controls the motion of the submerged piston which constantly keeps the chain in tension.
This chain tensioner improves shifting performance, reduces noise, extends primary chain life, and reduces vibrations caused by the primary chain. Tensioner is designed to automatically self adjust the primary chain tension, even during acceleration and deacceleration. *NOTE: Head of adjustment screw should be 5mm out from body of hydraulic adjuster.