I'm assuming you put new seals in, which will cause a little bit of stick but not so much you cant turn the crank by hand.
make sure your seals are pressed in properly, and that your bearings races and cup are pressed in evenly and completely.
As Ed said, new bearings must go with their new races/ cups
also, are you re-using or using new crankcase gasket?
it might also help to assemble the case halves in the orientation it would be when mounted to the bike...
there is a large amount of info on MA about this rebuild, you should be able to find your problem and solution on here by digging in some forum threads. bottom line, if it doesnt feel right, its not.
take it apart and do it again.