Have had good luck with the Manchester chain. Make sure to get the heavy chain. Can't remember the number but it has bigger pins wears much better. Sprockets are a judgement call but it would be a shame to accelerate wear on a new chain to save a few pennies by delaying sprocket replacement. Replacing the sprocket,while not a walk in the park, is doable without special tools beyond a gear puller and 10 pound alignment tool. Be absolutely sure that the sprockets are TIMED. It can look ok and not be right. Also locktite sprockets to the shaft and set screws in the sprockets. Use the Arnold Schwartsinager (spIJ)(hereafter know as S+13) locktite. While the shaft is out check that it is not bent. This evidenced by run out, worn sloppy bearings or worn bearing mount areas on the shaft. lol