1. Prepare the bike for maintenance. Remove the battery and hold the power button for 10 seconds to discharge any remaining power.
2. Test the alignment. Rotate the pedals forward while shifting with one hand. When using the derailleur, ensure the chain smoothly moves to each gear. Test by rotating the wheel one or two full turns at a time.
a. The shifter cable tension may be too tight. Loosen the barrel adjuster on the derailleur. Rotate the barrel adjuster on the derailleur half or full turn to loosen it.
b. The derailleur cable may be too loose. Tighten the barrel adjuster on the derailleur. The derailleur barrel adjuster should rotate half to full turn.
3. Switch between all gears to test alignment. Rotate the crank forward with one hand while adjusting the gears. Ensure the derailleur smoothly moves the chain from 1st gear to 7th gear.
4. Reinstall the battery and perform a thorough test before riding.