Rebuilt Snowmobile Engines

I have a 1972 Yamaha Snojet ESS and I'm at the end of its reconstruction. Now, at the end of my clutch after the spring and weight assembly. Now I wonder how I keep these on. The only parts I have is a bolt that screws into the end of the tree a little bit open ring and a washer with a hook on one side. There is also a grove of about one inch from the tip of the tree and I can not figure out where these go. Any suggestions would be of great help. Thank you

you put the clutch on the tree and using the washer, screw it up. friction should keep it where you want. if not that, I misunderstood your question.