A motorcycle frame is a motorcycle’s core structure. It supports the engine, provides a location for the steering and
rear suspension, and supports the rider and any passenger or luggage. Also attached to the frame are the fuel tank and battery. At the front of the frame is found the steering
head tube that holds the
pivoting front fork, while at the rear there is a
pivot point for the
swingarm suspension motion. Some motorcycles include the engine as a load-bearing stressed member; while some other bikes do not use a single frame, but instead have a front and a rear subframe attached to the engine.
