Hayden Enterprises Primary Chain Tensioner for Big Twins
The M6 Primary Chain Tensioner makes a smoother ride by reducing annoying vibration, by keeping constant and correct tension at all times. Your transmission will 'click' into gear instead of 'clunk'. It also improves shifting performance while extending the life of your primary chain. You'll swear you just rebuilt your clutch and transmission. Easy installation (generally less than 1 hour for the non-mechanic), it's not necessary to remove your primary chain.
Automatically adjust the tension of the primary chain
Provide constant and even tension, which improves gear shifting
Reduce shifting noise; make for a smoother ride
Extend primary chain life
Made in the U.S.A.