ckoelliker,

If you havent already, upgrade to the 9T motor.
Its possible you have a little too much pitch on the top end. Unfortunatly, without a programmable radio, there isn't much you can do. You could reduce a little pitch on the blades by adjusting the ball links, but double check all the collective to make sure it still goes smoothly and in the right directions in both normal and idle up modes.

Im assuming you are flying in normal mode......its time to move up to idle-up mode.