* Voltage regulator failure: The voltage regulator is responsible for controlling the voltage that goes to the headlight bulb. If the voltage regulator fails, it can cause the voltage to spike and blow the bulb.
* Bad wiring: Faulty wiring can also cause headlight bulbs to blow. This is especially true if the wiring is old or damaged.
* Loose connections: Loose connections can also cause headlight bulbs to blow. This is because loose connections can cause arcing, which can damage the bulb.
* Bulb wattage: If you are using a headlight bulb that is too high of a wattage, it can also cause the bulb to blow. Check the owner's manual for your ATC to find out what wattage headlight bulb is recommended.
If you are experiencing headlight bulb failure on your 1985 Honda 250r ATC, it is important to diagnose the problem and fix it as soon as possible. Riding with a blown headlight bulb is dangerous, as it reduces your visibility at night.
