My Traxter 500XL cuts out when reving engine. Can get more RPMs with choke on but still cuts out and backfires. Mine has not been run in 10 years. Gas is new, Fuel pump is new, carb has been cleaned professionally with new jets and everything is very clean and all wires look to be in place. Very low hours on this machine. Have not done the fuel filters yet because they are in the tank. Tried looking for vaccume leak by spraying carb cleaner did not find one. Any help would be appreciated!