With the gas these days over here, if it sits for a week I feel no shame giving the OHV bikes a spritz of ether so that there is something that is actually volatile going into the engine. The Big twin flattie is the only exception. It'll fire on most anything left in the floatbowl for ages. The Knuck is especially sensitive to old gas. (maybe cast iron has something to do with it
Right on with the big singles. I started riding on BB34's, then Goldies. Imagine the irony of having a goldstar being towed by a Goldwing with a stout bungee cord to get started. yeah, glad those days are gone.
What a delight when I got the old M20. It's claim to fame, starting at -20 deg F, first kick, one crazed winter weekend in the Adirondacks of Northern NY.