As far as the running issue I'd wager you'll have to clean the carbs. Before that make sure the fuel tank vent hose isn't stopped up (under the plastic housing around ign switch). Make sure the fuel pump is running and filter is clear. Filter is down at the battery and a bit of a pain to get to. You can try some cleaner such as Berrymans or Seafoam, those can help if the carb isn't stopped completely, I like the Berrymans better but you'll get different opinions on that.