Motorcycle having enclosed running components

摘要

A motorcycle construction that lends itself to motocross use and yet which has a lightweight racing type frame with an engine arrangement (38) to provide a low center of gravity. Although the engine (38) is positioned low in the frame (22), its components and specifically the intake and exhaust system are designed so as to be well protected and a protective covering surrounds the engine (38) so as to also protect it. This protective covering is formed by a liquid tank such as a fuel tank (73) for the engine (38) and also serves to reinforce the frame assembly (22).