If your rear wheel locks while you are trying to stop quickly, it is usually best to:

Question

If you accidentally lock your rear brake when stopping on a good traction surface, keep it locked until you have completely stopped.

Accepted Answer

Keep the rear brake locked until you are stopped.

Answer

Maintain your position and release the rear brake.

Answer

Lean the motorcycle and release the rear brake.

Answer

Release the front brake and keep the rear brake locked.