Maxxus PRO SPK-23 Owner's Manual page 12

 STEP 3
After Steps 1 and 2 and if the resistance is still needed to be decreased or increased,
please follow the instruction below.
Press Spring (C), then U-shaped Plate (D) will become loose.
Take off the U-shaped Plate (D).
Loosen the Hexagon Screw (E) slightly to decrease the resistance.
Put back the U-shaped Plate (D).
** The more loose the Hexagon Screw (E) is, the less resistance.
** The more tight the Hexagon Screw (E) is, the more resistance.
IMPORTANT NOTE
Please slightly adjust the Hexagon Screw (E) each time (about 2 threads at a time) to find
the resistance which meets your need.
If you adjust the Hexagon Screw (E) too much, the resistance will become greater at the lower
gears and the higher gears will not be usable.
Normally, the resistance adjustment is resolved in the above 3 steps.
If the problem still exists, please proceed to Step 4.
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HOW TO MAKE RESISTANCE ADJUSTMENTS
 STEP 4
12
(E) (C) (D)