My daughters lt acts funny when ridden in deep sand for any extended period of time. Idk if it gets overheated or what's going on. You can pick the rear tires up off the ground & rev it up & it'll be fine for a lil while, then it'll do it all over again. Maybe it's stuck in high? I replaced the front variator plate & rollers, the rear brake shoe looking thingy's. I lightened them to 180 grams. I just don't know what else to do. Any ideas?