This diagram illustrates some of the important parts of a typical motorcycle. Transmission controls, such as the clutch and gearshift levers, are located on the handlebars or foot rests, where the rider can easily operate them. The rear shock absorber and other components of the suspension system cushion the rider from bumps and jolts of the road. The exhaust pipe carries exhaust generated by the engine to the rear of the motorcycle.
In their simplest form, motorcycles consist of a gasoline engine attached to a two-wheeled steel or aluminum frame. A fuel tank sits above the engine and usually sports the name or logo of the motorcycle’s manufacturer. The front wheel and axle are attached to the frame with a fork, a two-pronged, pivoting arm. Turning the handlebars at the top of the fork causes the wheel to pivot. Power from the engine turns the rear wheel. The rear axle is connected to the frame with a shock-absorbing arm.