Christopeit Sport BT4 Notice De Montage Et D'utilisation page 21

Step 3:
Attach the seat (18) and seat post (28).
1. Insert the seat post (28) to seat post mounting tube of mainframe (1)
and secure in position with the seat post quick release (29).
2. Place the saddle (18) with the seat surface downwards. Place the saddle
bracket (18a) on the upwards pointing bottom of the saddle (18). The
threaded pieces on the bottom of the saddle must project through the
corresponding holes in the saddle bracket (18a). Place washers (39) on
the threaded pieces, screw on nuts (38) and tighten firmly.
3. Put the clamp of saddle bracket (18a) to the seat slide (19) and tighten
the seat firmly into your desired position.
4. After place the seat slide (19) with seat (18) onto the seat post (28) fix it
with washer 10//20 (31) and hand grip nut (16). You can move the seat
slide to adjust your desired position.
Step 4:
Attach the handlebar post (17) at mainframe (1).
1. Remove the pre-assembled Allen head bolt (14), washers (6), and spring
washers (24) from main frame (1).
2. Attach the front post (17) to the front post mounting tube of main frame (1)
and connect the plug of motor cable (11) to the socket of the connection
cable (13).
3. Insert the front post (17) to mainframe (1) and secure, using Allen head
bolts (14), spring washers (24) and washers (6).
21