Doing a carb rebuild on a 1971 125 johnson. When i removed the needle valves I noticed there were no plastic needle valve bearings at the tip of the needle valves. Is it possible they are still stuck in the seating area of the carb or is it possible that they were not used . carb schematic only shows a plastic bearing on the tip of the needle and a retainer at the adjustment end. Difficult to get a good visual inside of the seating area. Thank you for any help.