To make compact a power unit and drive wheel assembly comprising a power unit composed of an internal combustion engine and a continuously variable transmission, and a drive wheel(s) by arranging a cylinder block of the internal combustion engine so as to stand close by one side of the drive wheel.
An input shaft 1 and an output shaft 2 of a hydraulic continuously variable transmission T which are coaxially disposed are engaged with each other through the intermediary of a bearing and the input shaft 1 is coaxially connected to a crankshaft 61 of an internal combustion engine E, while the output shaft 2 is fixed to a hub of a drive wheel W, and a cylinder block 63 of the internal combustion engine E connected contiguously to a casing 52 which accepts and supports the crankshaft 61, the input shaft 1 and the output shaft 2 is disposed so as to stand close by one side of the drive wheel W.
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