Motorcycles, becoming popular in the early 1900's, these machines have progressed into mosters of the road.
Motorcycles are a more simple solution for internal combustion engines. Much cheaper to make, and easier for maintenance.
The appearance of motorcycles have changed slightly throughout the years. The edges more refined, less bubbly.
The rules of the road have some differences when it comes to motorycles. Particularly in California where you are allowed to lane split. Lane splitting is when you ride inbetween lanes to overtake a car. Generally people who have sport bikes and wear full gear will lane split because they can't afford to sit in traffic in the frezing Cold/Blazing hot weather.
Motorcycles are a great hobby, you work on them for a weekend and then rip down the streets on your favourite piece of machinery.