Happened twice to me before I took off the crash bars for good. First time was a very hard crash which completely popped off the left side clamp, allowing the crash bar mounting arm to continue past the frame and smack into the rear head with enough force to mark the head. It also meant the bolts holding the front cross bar smacked into the oil tank leaving 5mm wide gouge. The second time was a hard fall (bloody deep ruts at speed) to the right side, which knocked the right mount into the tank just like yours. Took them off, and now enjoying the looks, lack of weight, and reduced width. Horses for courses - low speed or on road offs I still think they are great, but high speed offroad crashes they do catch on a lot etc..