If your bbs are not hoping it is probably from the hop unit. Over time the arm that depresses on the hop rubber to give hop gets bent and weakened. Take apart the hop unit and remove the tension arm. Bent it 'tighter' so that it presses the hop rubber more- giving more hop up. Also when you re-install the tension arm make sure the hop wheel is set to 0 or 'no hop'. This should give you more hop with less wheel turning.
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