How come my bering on the forks and the coster brake keep getting fouled up. The bearings on the frount were kind of loose then I tightened them up and then they messed up. The other picture in the coffee can lid is of the berings on the sprocket side the inner ones. the the sprocket functions on. I think I have them adjusted right what is the best way to adjust them. The one on the coaster brake just gets crunch back there and the bearings pop out the one on the forks grind down to almost nothing. These are from late modle chines parts.