Whirlwind C4 - Secure Frame and Unfold Headstock; Install Handlebar and Seat Post

Whirlwind – C4 – User Manual – P. 5
2-2. Fasten the lock to secure the frame in place
2-3. Unfold Headstock
a. Hold the bike, unfold the stem upright, and ensure
it is in line with the below part
b. Fasten the stem folder upwards until you hear a
click
2-4. Install the handle
a. Put the handlebar inside the holder as shown,
fasten the holder and tighten screw.
b. Adjust the handlebar angle and position to finish
installation and make sure the handlebar is
tightly secure