1. When the bike leak gas, at the same time there is sparking, then it may cause spontaneous combustion;
2. the inner line of the motorcycle is self refitting, which causes the bad line contact. In particular, when the contact of the battery is in bad contact, it is very easy to produce spark ignition.
3. improper parking position, in a relatively closed high temperature environment, plus oil leaking on motorcycles, it is also very easy to occur spontaneous combustion of motorcycles.