1980 Bonneville T140 Issue

@Dan m Welcome to the family. Yes i think you need to look at those carbs. Those mark 1and half's were really poor from the word go. Also check those chokes even worse. But it already looks like your bike has been converted back to cable operation. Looking at your inlet rubbers they look quite poor. And check the bowls are filling to the right level. Don't know what petrol you use over there but here the old ethanol plays havoc with the carb internals and hoses. I do wish you luck in curing it as it looks a real nice bike.