Just personal advice,... everybody's different, but...
In general,... if you don't need choke a start-up, you're running rich...
Idling to warm up is a waste of time and gas...
I tend to go a mile or two with choke, don't push the engine when it's cold,... and then I'm good...
... if temps are approaching 95 degrees or more,... I don't need choke... but, I still take it easy for the first couple of miles...
... idling to warm the engine, in an air cooled thumper, will heat up the metal parts faster than the oil, and cause premature wear...
...(just my theory)...
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