Insert the key into the seat lock, and then turn it counterclockwise.
Lift the front of the passenger seat and pull it forward.
Insert the projections on the rear of the passenger seat into the seat holders as shown, and then push the front of the seat down to lock it in place.
Remove the key.
Remove the passenger seat.
Remove the cap, then push the rider seat lock lever, located under the back of the rider seat, to the left as shown, and then pull the seat off.
Insert the projection on the front of the rider seat into the seat holder as shown, and then push the rear of the seat down to lock it in place.
Install the cap.
Install the passenger seat.