I always put a small tie-wrap on engine side of chain before removing, this way chain goes back on in same direction.
I put it in can of mineral spirits and let it soak for a day then blow and oil.
I run a open,put new chain on every few races chains are cheap.I clean with mineral spirits and blow the chain out. Then heat with a heat gun and spray chain wax on inside and out. Doesnt fling into clutch. Chain last a whole year for me