Insert the key in the lock, turn it clockwise and release the seat.
Pull the seat (1) backwards to release it from the front catches and remove it.

Seat
Disassembly of the seatReassembling the frame and the lateral footrests
Apply the recommended grease to the thread of the pins (9) and of the nuts
(8).
Place the frame (1) and the brackets (2) and (3) on the engine block. Start the
pins (9) by holding the nuts (8) and insert
without tightening the screws (6) into the adjusters (4).
Position and fix the rear s ...
Checking the engine timing
Set the engine to the configuration described for the "checking and adjusting
the valve clearances", previously indicated.
Install tool 88765.1188 (G) in the spark plug bore to determine the piston tdc,
the gauges (h) on the tool 88765.1518
And the timing check tool (degree wheel (l) 887 ...
Removal of the tail light
Disconnect the connectors (a) and (b) of the tail lights (1) and (13).
Loosen the screws (4) and slide the tail lights (1) and (13) to the rear side;
recover the four spacers (3) and the washers
(14).
...