Patent ID: RE40289

Claim:
A snowmobile comprising a frame assembly, a drive assembly coupled to the frame assembly and including a drive belt adapted to contact a ground surface to propel the snowmobile over the ground surface, an internal combustion engine supported by the frame assembly, the engine comprising a crankcase, a crankshaft rotatably journaled within the crankcase, a cylinder block assembly extending from the crankcase, a cylinder head assembly connected to an end of the cylinder block opposite the crankcase, and a cam drive mechanism including at lest one camshaft rotatably journaled within the cylinder head assembly, and a transmission coupled to the crankshaft to transmit power from the engine to the drive assembly, wherein the cam drive mechanism is connected to the crankshaft, at a first end portion of the crankshaft, and the transmission is connected to the crankshaft at a second end portion of the crankshaft opposite the first end portion.