Not too mention those air mixture screws. I have seen a carb be completely clean, and the person didn't clean those air mixture screws saying "oh those don't need cleaning they are just there to adjust"....smh okay so yeah they do that but some also have holes in them as well that need to be cleaned. Also clean that airbox as well over time in a year there can be mouse nests in there. Also you never said if it had VES Valves if it does you need to clean those as well. Those being gummed up can cause issues.