The negative cable, which is normally connected to the negative pole of the battery, is fastened to the crankcase. From here, the cable branches off and splits up within the electrical system to carry the ground connection to the different elements in the system.

The image shows the ground connection on left side of the engine crankcase.
The battery charging circuit and power distribution
Electrical power for lighting and signalling devicesRemoval of the primary drive gear
Withdraw the clutch housing (1) complete with driven gear of the primary pair
(a).
Remove the inner spacer (2).
Remove the oil pump (d) (sect. 9 - 2.1, Removal of the oil pump).
Lock the primary pinion (b) with the holding tool 88713.3417 And loosen the
threaded ring nut (3) u ...
Refitting the front forks
Refit the fork legs, positioning them at the height shown in the figure
relative to the upper surface of the bottom yoke.
Warning
The difference in height between the two fork legs must be no
greater than 0.1 Mm.
Position the fork legs (5) and (6) on the yoke base (4) and on the steering ...
Removing of the rear footrests
The removal of the rear footrests is described for the right side but it is
the same for both.
Undo the pin (13) and remove the rh rear footrest (12) from the frame.
Recover washer (8) and the o-rings (9).
If necessary remove the rubber footrest (11) of the footrest (12).
...