I had just under 16k miles when I changed the sprockets and chain. the sprockets actually looked alright, I was just told from multiple people that if I change the chain then change the sprockets at the same time. I was on a high mileage road trip and the day before I left, to go home, we noticed the chain was extremely loose. we ran out and got it tightened at a shop and he suggested that I change out everything. the next day when I got home, after about 4-500 miles, the chain was just as loose. I actually just got done going through the lines to make sure there was nothing weird and bled the brakes again, the feel in the controls feels better but I have not ridden it yet. I really do need to change the pads, but they are the factory ones right now. I will probably change them out soon.