What Is a Motorcycle Subframe?

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.

What is the subframe of a motorcycle?

The subframe is the bit that holds the seats and bolts onto the back of the mainframe that holds the engine.

What is the purpose of a subframe?

The purpose of using a subframe in an automobile is to distribute high local loads over a wider area of the body structure (most relevant in thin-walled monocoque body designs) and to isolate vibration and harshness from the rest of the body. The subframes are bolted or welded to the vehicle body.