I recently upgraded to a 2014 570efi from a 2003 Sportsman 600. I have only ridden it one time since I really only use it for hunting seasons, but I noticed when riding at low speeds when i let off the throttle, or reapply it, a slight clicking sound in the rear-end. Like there is some slop in it. My 600 did the same thing but I just thought it was because it was 10 years old. This one is brand new. Is this just something that the Polaris atv's do? Just wondering if anyone else has had this experience.