I've been up to SF plenty of times, but I've never just spent a day walking around the city. What did I see when I did just that this past weekend? Lots and lots of people using motorcycles and scooters as everyday transportation. Beat to shit scooters, Harleys, at least one SR500 cafe racer and plenty of old Japanese sportsbikes could be seen parked in the motorcycle-only parking, on sidewalks and splitting through traffic pretty much everywhere I looked. Riders were wearing gear. They were riding competently in traffic. In San Francisco, unlike any other American city, motorcycling is simply a daily way of life for a broad cross section of city dwellers. Here's what my camera saw.