My 250r rear axle got really hot after making a few blast on it. It just seems weird because I just put new bearings in it and it rolls fine without noise and only gets hot by the sprocket. Anyone ever have this problem.

 

One of three things had happened. One of your new bearings has siezed, the brake caliper is dragging some, or the bearing carrier or axle is damaged where the races are placed.

Jack the rear of your machine up and turn the axle by hand. Check resistance as you turn and also play on the sprocket size.

 

my sproket gets hot when my chain is too tight check it

 

I checked everything and I am still
clueless. Oh well I will find out what it
is when it brakes.