Here is a brief idea of the types of items I usually have on hand:
Engine gaskets, seals, rings, pistons.
Various small electrical parts and connectors.
Ski leg and suspension bushings and stoppers, various small parts for steering and suspensions.
Various plastic and rubber trim items.
Many oem item hardware and fasteners.
I have NO tracks, skis, windshields, cabs, suspensions, seats, complete motors, exhausts, gas tanks, etc.