人生病有症状,同样,摩托车在发生故障之前,一般会预先表现出某些“症状”。运用看、听、嗅、摸、试五法,可及时发现隐患并排除故障。看就是观察。通过对摩托车外表仔细地观察,检查有无松动、脱落、损坏、漏气、漏油现象。例如:发现气缸盖与缸间体漏气,一般是由于气缸盖螺母松动 People are sick and symptomatic, and similarly, motorcycles typically exhibit certain “symptoms” before they fail. Use to see, listen, smell, touch, test five, timely detection of hidden dangers and troubleshooting. Look is to observe. Through careful observation of motorcycle appearance, check for looseness, loss, damage, leakage, leakage phenomenon. For example: cylinder head and cylinder leakage found, usually due to the cylinder head nut loose