Step 3
Attach the lower left handlebar (52) to the left side axle of the handlebar post (9).
Secure by using D type washer (29), one flat washer (26), one spring washer (27),
one hex head screw (28).
Repeat for the bottom right handlebar (53).
Attach the upper left handlebar (12) to the lower left handlebar (52). Secure by
using two carriage bolts (21) and two allen bolts (22).
Repeat for the upper right handlebar (13).