| 摘要 |
It is an object in an engine for motorcycles to sufficiently increase an upward offset of a transmission input shaft without being obstructed by a cylinder block, thus shortening the overall length of the engine in the longitudinal direction of the motorcycle. To achieve this, in an engine for a motorcycle having a cylinder block 22 extending upwardly and forwardly of a motor vehicle M from an upper portion of the front end of a crankcase 21, and a transmission input shaft 71 offset upwardly with respect to a plane P which includes the axes Ac, Ao of a crankshaft 28 and a transmission output shaft 72, the cylinder block 22 is disposed to have its axis Ab passing forwardly of the axis Ac of the crankshaft 28. It is thus possible to sufficiently increase an upward offset of the transmission input shaft without being obstructed by the cylinder block. <IMAGE> |
