Re: how cold before the bike doesn't start?
One of our members is from Moscow Russia and has posted videos of himself and his club members riding in the dead of winter...Cold enough for you?
Actually there might be a limit but it has to be pretty darn cold. I've riden in winter often in Denver Colorado and when it's real cold I'll give the carb a shot of quick-start, ether, and after a few seconds of warm up and some choke my engines perform the same as they do in summer; maybe a little better. Hope this answers your question.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"