Undo the screws (2), remove the rear-view mirrors (1) and recover the washers (4).

Rear-view mirrors
Refitting the rear-view mirrorsAdjusting the steering head bearings
Excessive handlebar play or shaking forks in the steering head indicate that
the play in the steering head bearings
requires adjustment. Proceed as follows:
loosen the clamp screw (1) that holds the steering tube to the steering head.
Slacken the clamp screws (2) securing the steering head ...
Removal of the crankshaft/connecting rods assembly
After separating the crankcase halves, withdraw the crankshaft (6) complete
with connecting rods (2).
...
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 ...