It's kinda hard to explain on the end of the cam I would call it a balancer but not exactly sure what you technically you would call It on opposite side of the sprocket there what I would call a balancer on the end of cam. Theres a spring and looks like a balancer. When I put the new cam in spring seemed loose so I spun it around once then put I it back in so snaps back kinda quick instead of very loosely hard to explain but heads off now everything looks good beating my head against the wall
I dont understand it at all