| 摘要 |
PROBLEM TO BE SOLVED: To provide a motorcycle with an oil passage structure adequate to a vertical V-type two cylinder engine and better in design quality without requiring an oil passage in the wall of the engine for forcibly feeding oil to a head gallery. SOLUTION: The oil passage structure comprises rocker shafts 325, 326 having oil passages inside provided in a pair of cylinder head assemblies 30f, 30r for the engine E and extending to directions equivalent to the right and left on their mutually opposite and separation sides for operating inlet and exhaust valves, a communication pipe 327 for communicating the rocker shafts with each other, and a return pipe 22 connected at one end to the rocker shaft communicated with the exhaust side rocker shaft, connected to a passage communicated with an oil pan 10, and externally attached to the left side faces of cylinders 70f, 70r. Engine oil flows from the inlet side rocker shaft to the communication pipe, the exhaust side rocker shaft and the return pipe, in sequence, and it returns to the oil pan 10 with its dead weight. COPYRIGHT: (C)2005,JPO&NCIPI
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