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四冲程摩托车在使用过程中，需要经常调节气门。现介绍一种调节气门的简便方法：首先把火花塞卸下，用手慢慢转动启动杆，用干净的螺丝刀插入火花塞孔，当感觉到活塞将螺丝刀顶起且处在最高位置时，检查一下推杆组件能否自由转动。如果能自由转动，即为压缩行程的终点。然后，
Four-stroke motorcycle in the use of the process, the need for regular adjustment of the valve. Now introduce a simple way to adjust the valve: First, remove the spark plug, slowly turn the starter lever with a hand, a clean screwdriver into the spark plug hole, when you feel the piston jacking the screwdriver and in the highest position, check push Whether the rod assembly can rotate freely. If you can freely rotate, is the end of the compression stroke. then,