1. Shift to gear 1
2. Shift to gear 5
3. Shift to gear 2
4. Examine the 2 yellow lines on the right side of the hub. If the lines are not lined up, continue to step 5. If not, no adjustment is needed.
5. Turn the knob on the shifter where the cable exits, circled below. After 1-2 turns, shift to gear 1, then to 5, then back to 2. Repeat step 4.