Motorcycle failure

Common failures of motorcycles 2021-11-29:

1, throttle line, odometer disconnected, throttle line too tight, etc.

2. The air filter is loose or abnormal.

3. The engine or reverse oil leakage. The oil is unqualified or too little, and the piston may have problems because of burning oil. Damaged oil seal or gasket

4, the idle speed is too high, the mixture is too thick, and the burner is flooded.

5. The spark plug has serious carbon deposition, which is easy to turn off and difficult to start, and the spark plug is loose or too tight. The spark plug has low quality and poor ignition performance. Spark plug damaged primer or no spark.

6, exhaust pipe shooting, black smoke, exhaust pipe gasket leakage (black smoke is mainly because the mixture is too thick).

7. The igniter is in poor contact or damaged. Problems can also occur if the igniter and rectifier do not match.

8. Virtual connection, circuit virtual connection or safety tube falling off. The negative grounding of the whole vehicle or equipment is virtual or detached.

9. The high-pressure cap is damaged or has poor contact with the high-pressure shell. The fixation on the circuit plug is missing, the plug is loose and the contact is poor. Poor grounding of high voltage package leads to flameout. (Insulating paint, rust and looseness should be avoided for grounding wire).

10, the chain car is broken. The transmission shaft, cross shaft, universal joint and convex plug of tricycle are loose.

1 1, the new car battery is unqualified, the appearance is old, the power is weak, and it will be dead in a few days.

12, the brake light wiring is not connected or pulled off.

13, poor contact or damage of the horn.

14. The electric door lock head is loose, poorly contacted or damaged.

15, instrument and oil gauge connector is loose, misplaced, poorly contacted or damaged.

16, the throttle handle has unlimited reversing and is easy to be damaged. Broken line caused by unqualified throttle line, tight throttle handle, damage, etc.

17. The shift and reverse screws are loose, the shift lever is misplaced, and the reverse gear is misplaced.

18, carburetor leaks oil, oil drain screw falls off and leaks oil. The carburetor mixing ratio screw disappears and the mixing ratio is unbalanced. The bolt of the metering hole in the carburetor is loose, so the fuel cannot be added, the throttle is turned down, the oil circuit is not smooth, the internal dirt is blocked, and there are problems with the triangular needle valve and the oil float. When cleaning the carburetor, protect the small parts inside to prevent them from being lost. Also remember the up and down direction of the float, and the two-hole bolts should not be loose.

19. The oil quality and addition amount of engine oil and gear oil are not up to standard, the reverse gear leaks oil, the reverse gear screw is loose, and the fastening screw is missing.

20. The front wheel bearing is abnormal and damaged. Front wheel bearing is damaged (check and refuel frequently).

2 1, the front wheel brake is basically invalid, there is something wrong with the internal brake of the front wheel, and the rear brake deviates (three wheels).

22. Clutch problem, abnormal sound, half-empty rotation (at least slow down 1-4 when upshifting, no refueling, and stop when downshifting 4- 1).

23. The engine and reverse gear are damaged quickly due to abnormal sound, foreign matter or insufficient lubrication. The gear set of the rear axle lacks lubrication, and it will creak and wait for a while when driving, and the inside will be burnt and seriously worn.

24. The transmission shaft is rusted, rattled, abnormal, lacking large screws, and the engine output shaft slips.

25. The inner baffle of reverse gear lacks fastening screws. Loosen the adjustment screws of the parallel support bars on both sides of the rear axle from the fixed position.

26. The carburetor is dirty and blocked, the oil leakage pipe leaks oil, the air filter is loose, and the oil drain screw of the carburetor is loose while driving, resulting in serious oil leakage (which is very dangerous).

27. The tire is inching and the valve core is a little loose. (Can be tightened with a valve core wrench)

28. The hub flange is abnormally damaged. The metal frame is welded somewhere. The front wheel screw is loose, and the shock absorber rubs the wheel.

29, gasoline tank is not clean, carburetor oil needle pollution, can't return to normal, leading to oil pipe leakage. (Removable cleaning. When installing a new fuel pipe or gasoline filter, spray the inside of the fuel pipe with a special cleaning agent to prevent tiny foreign objects from entering the carburetor. ) Rainwater enters the fuel tank or carburetor.

30, spark plug carbon deposition, exhaust pipe smoke. (Mainly mixing ratio, oil stain, low oil needle card, etc. )

3 1, exhaust pipe blasting (mainly the above problems), exhaust pipe screw loosening, gasket damage, exhaust pipe damage, loopholes, excessive noise, etc.

32. Burning engine oil (the oil seal in the piston and cylinder head leaks oil) and spark plugs (the quality of engine oil and spark plugs is low, the air filter is blocked, the carburetor is poor in quality, the interior is dirty, and the igniter is faulty, etc. ).

33, difficult to start, unstable idle speed. (Mainly due to the above reasons, as well as the uncleanness of carburetor, poor oil supply, incorrect mixing ratio and idle speed adjustment, etc. ).

34. The battery is out of power, outdated or unqualified. (Mainly due to poor connection of virtual circuit, mismatch or poor contact of charging rectifier, wiring harness problem, battery failure, etc. )

35. Oil leakage (engine, carburetor, fuel tank, tubing, reverse gear, rear axle gear set) is mainly caused by loose screws or incorrect installation, or oil seal gasket damage failure, or foreign body, or vent hole blockage. ).

36, the circuit is virtual, and the gas is blocked. The circuit plug-in is prevented from being broken, the connector of the electric plug is loose, and the metal sheet inside the plug is loose and loose, resulting in poor contact.

37. During long-distance driving, the guide wheel burns out, the ignition timing changes, and the flameout cannot be started (replace the timing system).

38. The reverse gear of the new car is particularly abnormal, and the reverse gear is likely to fail seriously, or the old one is damaged, lubricated less, or improperly installed.

39, turn signal relay (flasher) failure or poor contact, poor contact of vehicle circuit, open the electric door lock sometimes no electrical response or power failure. If the circuit is virtually connected or damaged, check the battery and the circuit, the positive pole of the circuit, the grounding wire and the safety tube, especially the connection and fastening state on the lock head.

40. After turning off the switch key, the motorcycle still doesn't turn off. There may be something wrong with the electric door lock and wiring.

4 1, sudden flameout in the process of fast driving, which may be caused by too long and too fast driving time, piston sticking and cylinder pulling, or insufficient lubricating oil in the engine or blockage or failure of lubricating oil circuit. Check the lubrication frequently.

42. Motorcycles suddenly start to lock up or lock up, usually burning engine oil, and the engine oil is dry. The lighter should immediately check the oil and add it in time. In severe cases, the engine is basically scrapped. Engine locking during driving may also be caused by overheating and hardware damage.

43, the battery is difficult to charge, weak current, lack of electricity, short life, easy to fail or damage. There may be problems with the magneto, charger, circuit contacts and battery itself.

44. The brakes are not sensitive enough. The tricycle deviated from the track. Note: When using a motorcycle, always check and debug the brake shape to ensure driving safety.

45. The transmission shaft is shaking and rattling.

46, cylinder head valve wear is serious, valve clearance is too large or too small, valve spring failure, etc. , it will cause poor startup and unstable power.

47. The hydraulic disc brake wheel is too tight and the wheel rotation is blocked.

48. The motor circuit has poor contact or short circuit or damage, or the motor screw is loose.

49. Driving is weak, the fuel filler door is closed, (the carburetor screw is loose or the metering hole bolt inside is loose, or the carburetor and the engine joint leak oil. Or the mixture ratio is too rich or too thin, the air filter is blocked, and the exhaust pipe is blocked).

50. Can't find the fault: unknown reason, irresistible force, providence or fate.