CVT comet clutch help

[amehel0]

what keeps the comet clutches in place. ive seen this video

http://www.youtube.com/watch?v=4SoH0U6Pkkk

i dont see any housing for it. im trying to solve a problem on my engine to run a clutch.

 

[Youngbird]

I would imagine that there is a key that slides into the slotted shaft on the engine and then a washer and a bolt that holds it all in place as in most all other such applications, or quite possibly a snapring....

 

[GearNut]

The Comet clutches on my minibikes and go-kart are held on by 2 set screws. A key keeps the engine shaft from spinning inside the clutch hub.