Remove generator cover (Removing the generator cover) and the flywheel/generator unit (Removing the flywheel/generator unit).
Loosen and remove the fixing screws (1) and (2) of the complete gear selector lever (3) and collect the spacer (4).
Remove the gearchange mechanism complete with the shaft, spring, and stop plate.
Visually inspect the gear selector claw (5) for wear, particularly around the area where it contacts the selector drum.
If it proves necessary to change components, disassemble the gear selector lever as shown in the exploded view.
Reassemble the gear selector lever orienting the eccentric pin (6), suitably lubricated, in such a way that the lever arm
(7) is positioned centrally with respect to the shoulders of the stop plate (8).
Check that the spring (9) is installed correctly as shown in the figure.
Then tighten nut (10) to a torque of 10 Nm (Min. 9 Nm - Max. 11 Nm).