Causes of Motorcycle Spontaneous Combustion?

[LaElliot]

Motorcycle spontaneous combustion mainly occurs due to electrical connectors or wires spontaneously grounding and sparking, generating high temperatures that ignite flammable paint, leaked gasoline, or other combustible materials. Therefore, electrical leakage or grounding sparks are critical factors, and reducing fuel leakage is particularly important. The specific causes of spontaneous combustion are as follows: 1. High-voltage ignition leakage sparks: When the engine is running, the ignition coil reaches high temperatures, causing the insulation of high-voltage ignition wires to soften, age, crack, or deteriorate. This allows high-voltage ignition electricity to easily penetrate the insulation (at cracked areas) and spark between the wire and the motorcycle's body parts (grounding). If the spark comes into contact with the paint on the frame or fuel tank, or with gasoline leaking from the carburetor, it can lead to ignition and combustion. 2. Electrical devices, switches, or wires breaking and sparking: Although most electrical devices, switches, and wires operate at low voltage, any breakage, poor contact, or insulation damage can result in grounding and sparking. 3. Electrical failure and short circuits: A common example is the rear brake light failing due to contact point welding. Prolonged grounding can cause high current to pass through the wire, melting the insulation and leading to widespread electrical leakage. The resulting high temperatures can ignite flammable materials such as paint or leaked fuel.