Parts such as the Cam Chain / Tensioner: Washer Setting, Plate B Comp.cam, Guide,cam Chain, Pin.b,tentioner are included in the Cm185t Twinstar 1979 (z) Usa Cam Chain / Tensioner parts fiche.
Check out any of the twenty-eight Cam Chain / Tensioner components enlisted.
On this parts fiche the Pin,lock 6mm is the most specified component.
