I saw a 2008 KTM 300 catch on fire once. A guy I was riding with accidentally left a rag in the air filter. So when the bike started it would flood out major. So he kept taking off the gas tank, turning the bike upside down and dumping out the gas. Well, one time he was doing that and he was kicking it over to flush the gas out. However, he also had the spark plug still hanging there and next thing you know bike on fire! We were able to put it out though before any damage occur.