I have a 2017 MX love the bike. I've had it for about 3 months and put 1000 miles on it! It has 2225 miles on it total. Recently I noticed the cogging noise at faster speeds when coasting and more rolling resistance and a vibration you can feel through the foot pegs. The sound seems to go away on acceleration. I took the gear reduction cover off and everything looks fine and still on the paint marks. I also checked the chain, sprockets and wheel bearings. Just wondering if anyone else has had this issue?