I had the habit of starting my Stag engine every monht and running it to warm up. A month gave time for oil to drain so the monthly start ups eventuall knackered the engine.
Quotes from the OPERATING, MAINTENANCE AND SERVICE HANDBOOK OF A 1964 5.7 V8 GORDON KEEBLE
WARMING UP THE ENGINE
“DON’T start up a cold engine and then leave it idling while you rush indoors to pay a belated farewell to your wife”.
In the interest of minimum engine wear, skip the farewell and drive away. When facing the music on your return in the evening, make a mental note henceforth to adopt a definite sequence of events prior to your morning departure. You will achieve substantially diminished wear from your engine and deserve greater affection from your wife”.
That's good advice.
My Goldwing manual also says similar (without the wife bit), as it states leaving the engine to idle while cold means it will be running with the fuel mixture enriched much longer than designed, which threatens to wash away valuable oils in the cyclinders and also cause carbon build up!
It goes on to say, have your gates open, gloves on and be ready to ride away as soon as it starts up.
The engine will warm up more readily, choke and enrichers removed quicker, hence returning to normal mixture settings faster.
Much better to just drive it regularly if you can
