I am looking for some advice on why my 92 en500 is really hard to start. It has new gas, new plugs, cleaned the carbs, Adjusted the valves to spec, charged battery to full, and even tried starting fluid but it is still hard to start. Ive tried full choke, half choke and no choke when starting it. It will crank and crank and fire a little bit now and then. It will backfire into the carbs sometimes when trying to start it. then all of a sudden start right up. It runs great when it is started. Doesnt smoke or even sputter when it is running. Stays running and idles great. I've taken it on a 5 mile ride and shut it off and tried to start it back up and I have the same problem with it not starting. When i got the bike it wasnt running. Had carb issues with flooding but cleaned and replaced the float valves and the needle jet was missing in one of the carbs but I replaced it and no more flooding issues. I'm trying to figure out what else I can look into on it before taking it to a mechanic and spend alot of money. Can someone please give me some options on why it isn't starting.