After i low sided about a month ago, i fixed my bike back up and started riding it again. A few days ago i noticed a knocking sound coming from the front. I used a front stand and took off my brakes and front fender, then spun the tire manually with my hand and can hear a knocking sound coming from the front axle. Anyone know what this could be? bad bearing? Can someone give me some instructions on how to take off the front wheel and take off the axle?