To judge whether the dirt bike Magneto coil is good or bad, the most direct way is to measure the resistance of the magneto stator coil with a multimeter. For motorcycles with DC ignition, the magneto only has a trigger coil and a lighting charging coil, and the resistance of the trigger coil is generally 100. Multi-ohm, the resistance value of the lighting coil is smaller, generally only a few tenths of ohms to a few ohms.

The dirt bike Magneto coil manufacturer tells you that the quality of the lighting coil can also be judged by measuring the voltage between the two or three lines of the lighting coil with the AC voltage range of a multimeter after starting. When the accelerator is increased, the output voltage It should reach above 50 volts (about 5000 rpm).
The manufacturer of dirt bike Magneto coil tells you that you need to first check whether there is high voltage in the spark plug and the high voltage line. If there is no high voltage, you should check whether the high voltage package, igniter, magneto coil, electric door lock and the wiring between them are something wrong.
If there is high-voltage electricity, check whether there is gasoline in the carburetor, whether the carburetor is blocked or improperly adjusted, and whether the intake pipe is leaking.
Check whether the cylinder compression is normal. If the cylinder pressure is too low, it cannot be started. The simple method is to remove the spark plug, block it with your finger and step on the starter lever to feel whether the pressure is strong enough.
The manufacturer of dirt bike Magneto coil tells you that you also need to check whether the exhaust pipe is blocked and not ventilated, whether the gasoline is not good, etc.