Don’t get me wrong for anyone in future reading this that may not know, all carbureted engines from cars to motorcycles to airplanes and chainsaws and everything inbetween benefit from choke and/or a bit of throttle on cold starts until they warm up. Fuel sticks to cold engine intake parts robbing the engine combustion chamber of fuel making the engine run too lean to stay running on their own. With the choke giving more fuel to make up for the sticking fuel the cold engine no longer runs too lean but runs rich while cold. When the engine is hot the parts have expanded and the fuel is entering without sticking losses so the combustion chamber is now running richer with the extra fuel from the choke so it can now be released as well as anyone who was playing with their knobs or handgrips can reverse what they may have done when it was running cold as the engine can keep itself running now.
PS don’t worry no photos of my large red knob, you’ll have to use your imagination for now.