Is this the shim I'm missing?
I was looking at the exploded diagram of the pedal start assembly on mopedjunkyard and according to that it seems like this should be the shim between the claw collar and final gear.
Seen here as part # 205-702
It's the only one from this diagram that I can't say I've laid eyes on while messing with it this past weekend.
I've definitely never seen it before. I'm just trying to figure out what exactly I'm looking for before I get home and start digging through my parts.