I just do not understand why my adjustment bolts on the back of my swingarm keep breaking off. I have put three in already and I guess vibration keeps breaking them off. My two farther back bolts of the 4 that keep the adj. tight keep loosening up within ten minutes of riding. I just put all new bolts and plates in the back to see if new bolts would hold it tight and it doesn't. I had to stop at least 20 + times yesterday to put my chain on. I would tighten it and with five mintues it would be loose again, no matter how tight I would get it. The adjustment absolutely sucks!!! I think I might have to start riding the honda again, I never had these kinds of problems with the 400ex. 1 bent axle, 1 cracked frame, new frame is flaking already, a chain that does not stay tight. Adjuster bolts keep breaking off and i have to tap them out. This adjustment is a terrible design it takes forever to adj. a chain on the trail. I thought I was riding a SUZUKI not a Polaris!!!!!