I was suprised to notice two breaks in the frame of my 92 XR600 after my last maintenance check. The first break is where the left side main tube below the motor meets the main downtube. The tube has bent, opening up a 3/16" gap. The second break is on a smaller tube, just ahead of the RHS foot peg. The weight on the footpeg has bent this down about 1/8". My assumption is the whole motor has to be pulled so the tubes can be welded completely. Is it possible to pull the motor as one unit without taking off the cylinder heads? Mike.