ok so i have a 91 lt250r and the crank arm moves to the side is it supposed to move at all

??
What exactly do you mean? Are you checking for side to side play in the crank? If your pushing back and forth on the balancer there will be a small amout of side to side play, there should be no up and down play. If so the crank bearings are going.
yeah like it moves quite a bit left to right and i dont know if maybe i need a new barring it doesnt move up and down
There should be no wobble in the crank. But a little end play is ok.