I just got a 92 en500 and it is hard to get started. The carb was flooding really bad but after taking it apart to clean I noticed that the needle jet on one of the carbs was missing. I replaced it and cleaned the carbs but the bike is still hard to start and now it has a high idle even after the idle adjustment has been adjusted all the way down. I've adjusted the butterfly valves in the carb but still no luck. When trying to start the bike it will back fire. When it is running the bike revs up really well but still has a high idle. I unhooked the vacuum line to the right carb and the idle drops down. Ive changed the spark plugs, cleaned the carbs, changed the oil and charged the battery but takes alot of trying to get it started even with starting fluid. Can anyone tell me how the vacuum lines are connected? The right carb has a line from the carb to the air switch valve and the left carb has a line from the carb to the gas tank. I wasn't able to do much work on it but I'm going to tear into it this weekend to see what I can figure out. Any advice would be great with my issues. Thank yo .