There are two very small screws on the front of the yoke. These have lock nuts on them inside the yoke. You can loosen the lock nuts and back off the screws to give you more lever travel. The levers on most machines seem to be setup for a 12 year olds hands. I move them out as far as I can and still grab them. If you cannot move the screws or need more, you can also loosen the part that the cables go into, pull the levers out and put them back in shifted a spline or two. With everything else in working order, this will give you enough lever to lock up all four tires on pavement.
You also want to completely change the fluid, not just bleed it. You will actually want to run enough through to flush out the crud. You don't really need to worry about the high end fluid much. The DOT standards are for the boiling point with a precentage of water in the fluid. The dry rating is much higher. If you change your fluid every year, you do not need to worry about the wet rating, only the dry. You can find inexpensive fluid with nearly as high of a dry boiling point as the very expensive stuff.