Thanks for the tips, guys.
The update so far is...
Stripped the bike down to the stator rotor, but I don't have proper tools to remove it to access the sprag. Waiting on a buddy for that.
In the meantime I'm going to look into getting the parts for a water pump rebuild.
I'm guessing I'll order the sprag from an LC4 to avoid having to buy the kit for the sprag, freewheel and rotor for the LC8. Spendy.