I can honestly say i have never had a bike come close to catching on fire, even if gas has leaked onto a hot motor, it just sizzled and evaporated, beside if the carbs are set up right with quality parts, they shouldnt be leaking from anywhere anyways. Obviously if your worried about it put them on and route them to the ground as i said before. i have never liked the way the looked which is why i have always left them off. To each his own, go ride and have fun.