| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary balancer support structure for motorcycle aiming at the lowering of the turning operation. SOLUTION: A crankcase 21 of an engine 16 is divided into three in the vertical direction, a cylinder block is arranged forward tiltiugly, each split surface of the crankcase is arranged orthogonal to the center axis of the cylinder block, a crankshaft 23 is arranged in the split surface of the upper crankcase, and a counter shaft and a drive shaft are arranged in the split surface of a lower crankcase. In a motorcycle with this structure, a secondary balancer device 47 is formed of a balancer shaft 48 and a balancer weight 49 formed integrally with the balancer shaft 48, and the balancer shaft is rotatably supported by the crankcase split surface via a metal bearing 50, and as the metal bearing 50, a half-type metal bearing is used and arranged so that the split surface thereof coincides with the crankcase split surface, in which the crankshaft 23 and the balancer shaft 48 are arranged.
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