Combination motorcycle frame and fuel tank

A combined motorcycle frame and fuel tank comprising:

• a first hollow elongated fuel containing beam member comprising one side of a two sided framework for the main chassis of a motorcycle and allowing fluid flow along its length,
• a second hollow elongated fuel containing beam member comprising the other side of the two sided framework and allowing fluid flow along its length,
• at least one hollow cross member connecting said first and second beam members and providing fluid communication between the interior of said first and second beam members,
• said beam members and said cross member defining a space in which at least a portion of the motorcycle engine is disposed,
• a fuel inlet port disposed in one of said first, second or cross members whereby fuel may be introduced into the interior of said members, and
• a fuel outlet port disposed in one of said first, second or cross members whereby fuel may be removed from the interior of said members and delivered to the motorcycle engine.