| 摘要 |
AN SOHC-TYPE ENGINE IN WHICH FIRST AND SECOND INSERTION/REMOVAL GUIDE SECTIONS (68, 69) FOR GUIDING THE INSERTION AND REMOVAL OF FIRST AND SECOND SPARK PLUGS (66, 67), RESPECTIVELY, ARE PROVIDED ON A CYLINDER HEAD (22) INCLUDING AN INTAKE VALVE (47) AND THE FIRST SPARK PLUG (67) DISPOSED THEREIN AND ARRANGED ALONG AN AXIS OF A CAMSHAFT (34), AND AN EXHAUST VALVE (48) AND THE SECOND SPARK PLUG DISPOSED THEREIN AND ARRANGED ALONG THE AXIS OF THE CAMSHAFT.
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