The air filter is dirty and clogged. This situation basically means that the engine's intake valve is blocked and can no longer breathe inside. If the air filter is disposable, it must be replaced with a new one. Of course, some are used multiple times and can be cleaned and put back. In this way, the EFI motorcycle can be used normally.
What is the reason for the motorcycle misfiring?
It could be a problem with the ignition coil or the trigger coil in the coil of the magneto stator. After running for a while, the hot coil starts to heat up. be open or short circuited due to high temperature, then check immediately and find that there is no high voltage fire. After a while, the motor temperature drops and the circuit break or short circuit fault disappears, and it becomes normal again. It is best to tropen a coil of the same model and install it to test it, otherwise it will be difficult to find the cause of the fault, because when the temperature is not high enough, everything is normal and an open circuit or short circuit occurs. will produce. does not happen.
If the motorcycle misfires from time to time, this is due to a virtual connection in the circuit. The high voltage box igniter or magneto coil is defective. First, replace the spark plug, then check it. high voltage package, then confirm the other positions in order.
If a motorcycle misfires when there is oil, it is probably because the mixture is too thin. You should first check the carburetor oil level, then adjust the mixer screw (usually in front of the carburetor) lower. part).
Motorcycle igniter detection:
1. There is a problem inside the high voltage box. Sometimes the engine can start, but cannotbe accelerated when the engine is increased, or the engine becomes powerless or stalls when the engine is put into gear and increased. I once repaired a car with this phenomenon, eventually removed a good high voltage package from another car and replaced it, and the fault was eliminated.
2. The high voltage box is poorly grounded. The paint at the connection between the car body and the high voltage assembly was not properly painted and the resistance value was due to rust from years of use. The main faults were difficult engine starting, poor acceleration and ignition. .
3. The performance of the internal components of the high voltage box has deteriorated or been damaged. Most of them are integrated high pressure packages with igniters. The internal structure of some models is more complex. If you suspect a problem with the caseer high voltage, it is best to replace it. I have measured many high voltage packages with a meter. Although they are the same model, due to different manufacturers, there is a slight error in the measurement results, but it does not affect the use.
4. The internal components of the electronic igniter have deteriorated performance or are open or shorted, the external plug of the igniter is loose, the wire clamp is not secure or a Oxidation occurs due to water ingress and moisture, which will cause weak sparking and starting failure.
Because this can cause the spark plug to misfire, check if the CDI igniter is operating normally. If necessary, you can use the substitution method to test whether it is good or bad. it must be replaced.