The symptoms of a broken dirt bike Magneto coil depend on the ignition method used by the specific motorcycle. If it is an AC ignition, the car cannot start after the magneto coil is broken. If it is a DC ignition, then after the magneto coil is broken, as long as there is electricity in the battery, it can be started normally. If there is no electricity in the battery, it will not start.

The easiest way to judge whether the dirt bike Magneto coil is good or bad is to use a multimeter to measure, that is to say, use a multimeter to measure the resistance of the magneto stator coil first. For a motorcycle with DC ignition, the magneto has two major parts: the lighting charging coil and the trigger coil. The resistance value of the trigger coil should be more than 100 ohms under normal circumstances, while the resistance value of the lighting coil will be smaller, basically only a few tenths of ohms to a few ohms.
In addition, if you want to judge whether the lighting coil in the magneto coil is good or bad, you can actually use a multimeter to measure the AC voltage after the car is started. The dirt bike Magneto coil manufacturer tells you that after the car is started, measure the voltage between the two lines and the three lines of the lighting coil, so that a general judgment can be made. Under normal circumstances, when the accelerator is increased, It is normal that the output voltage should be above 50 volts.
For people with strong hands-on ability, if you find that there is a problem with the dirt bike Magneto coil, you can check and repair it at home. However, if you don’t know the structure of the motorcycle very well, and those with weak hands-on ability, it is best not to disassemble it by yourself, otherwise it may cause damage to the motorcycle. It is better to go to a professional maintenance site to find a maintenance master to overhaul it.