i put new axle bearings in my sons 2000 blaster and when I put the sprocket on all spins well. When I tighten the firs nut it doesn't. It seems that when the axle nut is snug to the sprocket it is pushing the sprocket into the bearing seal and it's slowing down. Am I missing something. The bearings are pressed tight to the long collar that goes between them so they couldn't be to far out. Thanks