Patent ID: 7861816

Claim:
A motorcycle comprising: a main frame extending from a forward end to a rearward end and comprising a left main frame member and a right main frame member, wherein the left main frame member and the right main frame member each extend obliquely downwardly and rearwardly from the forward end to the rearward end, and wherein the forward end of the main frame comprises a steering interface and the rearward end of the main frame comprises a swingarm interface; an engine attached to the main frame at a location at least partially between the left main frame member and the right main frame member, wherein the engine comprises a first cylinder head and a second cylinder head, the first cylinder head is more closely adjacent than the second cylinder head to the steering interface, and the second cylinder head is more closely adjacent than the first cylinder head to the swingarm interface; a swingarm attached to the swingarm interface and supporting a rear wheel; and a seat configured to support an operator, wherein the seat is attached to the main frame at an attachment location, and the main frame, the swingarm, and the seat together define at least a portion of an open space, the open space being of sufficient size to facilitate complete access to the second cylinder head when the motorcycle is fully assembled.