Motorcycles are powered two-wheeled motor vehicles steered by a handlebar from a saddle-style seat. Most modern motorcycles are designed for a wide range of riding styles, and most brands have multiple models catering to different riders with various requirements. Generally, they have a steel or aluminium frame with a front wheel held by telescopic forks and a swingarm-mounted rear wheel driven by a chain, belt, or shaft. Some motorcycles have additional bodywork, designed for aesthetics or performance. Most motorcycles run on internal-combustion engines fueled by petroleum, but electric and hydrogen fuel cell technology also exist.
The most popular motorcycle brands are Honda, Harley-Davidson, Yamaha, Kawasaki, Suzuki and Polaris. Each of these has multiple models that span the range of engine sizes and overall motorcycle sizes available. A new rider should always take time to consider their options carefully, and make sure they are choosing the best model for their needs.
Many governments regulate tailpipe emissions from motorcycles, limiting hydrocarbons and nitric oxides to reduce air pollution. Similarly, some cities and regions limit the number of people who may ride a bike at any one time.
While some people are still intimidated by the idea of riding a motorcycle, a variety of factors is encouraging more people to give it a try. Discounted tolls, free parking (in non-car spaces), and HOV lane access all encourage perspective riders to test the waters. Also, a number of companies have designed small-displacement motorcycles to appeal to the growing market for riders who want to be green and save on fuel costs.