Mine is cold-blooded also. I have to leave it on the charger as well or it drains the battery after a few tries starting. I base my riding temperatures on whether or not I can get the bike to start. So far 19 degrees is the lowest I've ridden to work, although that was with a slightly clogged slow jet in one carb. Might be able to get it started at even lower temp this year since carbs were cleaned and upped from a 40 to a 42 jet.