Yes i have heard of swingarm failure as well, bottom mount snapping off, aarm failure seems to be common as far as failures go with this quad i think it is pretty good, i took off all that stuff right away and put on aftermarket suspension and i dont anticipate any frame problems but you never know, it all depends on what you are doing soemtimes a jump is just to hard on a frame and it will break, wether it is a lsr or laeger arens etc. does not matter, but for a stock frame it is doing really reall well...i have broken 3 400ex frames that all the honda riders praise and a few of those were back when i barely jumped 10 feet the last on was on axis suspension over a 70 foot triple...maybe hondas arent as bulletproof as all the honda riders think they are