| 摘要 |
A motorcycle (1) includes an OHC engine (13) and a fuel tank (22) closely above the engine (13). The engine (13) includes a crankcase (17), a cylinder block (18), a cylinder head (19), a cylinder head cover (20), and an oil catch tank (37) that is provided on the right side portion of the cylinder head (19) and cylinder head cover (20) and configured to separate oil from blow-by gas supplied from the crankcase (17) through the cylinder block (18). The oil catch tank (37) includes lower breather chambers (37a, 37c) formed in the cylinder head (19) and upper breather chambers (37b, 37d) formed in the cylinder head cover (20). The oil catch tank (37) is arranged as high as possible regardless of almost no space between the cylinder head (19) and the fuel tank (22).
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