Step 4
Install the saddle tube (5) on the main frame (1), and stabilize with the adjustment knob (17).
Step 5
Install the handlebar (11) on the handlebar post (12), and stabilize with 4 M8*15 inner
hexagonal screws (69), 4 M8 flat washers (48), and 4 M8 anti-loose nuts (70).
Install the upper handlebar cover (13) on the handle bar (11) and install the lower handlebar
cover (14) on the handlebar post (12), and stabilize with 4 self-tapping screws (68).