故障现象:一辆嘉陵JH125型摩托车,在修理店修理后行驶了几十公里,发动机出现异响,并且越来越响。 故障分析排除:接通点火开关,试启动,启动困难。启动后用长木柄起子听诊,在气缸盖上部发出“嗒嗒”的有节奏的敲击声,并混有一种无规律的“吱吱”声,怠速时明显,响声随油门加大而增大,加速和降速瞬间响声嘈杂。此声系恶性异响,为防止机件出现重大损坏,立即关闭点火开关。从异响发出的部位及响 Symptom: A Jialing JH125 motorcycle, driving in the repair shop after driving tens of kilometers, the engine noise, and louder and louder. Troubleshooting Analysis: Turn the ignition switch, try to start, start difficult. Start with a long wood handle screwdriver auscultation, the cylinder head issued a “clatter” rhythmic percussion, and mixed with a lawless “creak” sound, idling obvious, the sound increases with the accelerator increases Large, fast and slow speed noises. This sound evil, in order to prevent significant damage to the mechanical parts, immediately turn off the ignition switch. From the abnormal sound of the parts and ring