Patent ID: 6904883

Claim:
A line of internal combustion engines, comprising: a plurality of first engines, each said first engine including a first crankcase and at least one cylinder member connected to said first crankcase, each said cylinder member and each said first crankcase being separate components; and a plurality of second engines, each said second engine including a second crankcase and at least one said cylinder member connected to said second crankcase, each said cylinder member and each said second crankcase being separate components, said first and second crankcases different from one another; each of said first and second crankcases including at least one cylinder mount to which a respective said cylinder member is connected, said cylinder mounts common between said first and second crankcases whereby said cylinder members are interchangeably connectable to said first and second crankcases in the same manner; and each cylinder member having a valve train assembly including a cam gear rotatably mounted to said cylinder member.