I was out riding my ’15 xp1k today and noticed my hub was loose on the driver side rear wheel. I popped the center cap off and found that there was no cotter pin going through the castle nut, allowing it to back off. The other three hubs all had them but that one rear wheel didnt. Luckily I noticed it before it got too bad and damaged something, or worse. I have never taken off the wheels or anything since I bought it so that means it came like that. Might be a good idea to check yours out just in case. It takes less than a minute with stock wheels. :ok: