You need some Circular Pins to assemble the model.

Here is the list:

Φ2 10mm x2 (for the middle connection rod)

Φ2 16mm x1 (for the handle bar)

Φ2 14mm x 1(for the seat post hinge)

Φ2 18mm x1 (for the pedal)

Φ2 20mm x 2(for the front Pillar & Top cap Mounting)

Φ2 8mm x 1(fot thr rear Pillar Mounting)