2
42
5
4
3
4
2
1
3
2
ENGINE DISASSEMBLY
2.8.4 INTERNAL GEARSHIFT UNIT
AND COMPLETE GEARBOX
The internal gearshift unit is made up of the
desmodromic device 1 on which the fork 2 and two
forks 3 are engaged. The forks, supported by the pins
4, drive the sliding wheels of the gearbox, allowing
the desired ratio to be engaged. The desmodromic
device is controlled by the stop cam located in the
external gearshift unit.
Manually extract the two pins 4 so that the forks can
be released and removed.
Turn the fork 2 which drives the sliding gear on
the primary unit clockwise to release it from the
desmodromic control.
Carry out the same steps, though in the opposite
direction, on the forks 3 driving the sliding gears on
the secondary shaft.
Extract the desmodromic device.
Removal of fork support pins 1.
Disengaging the drive forks from the desmodromic de-
vice.
Extract the forks together with the guide bushes 5.
Extraction of forks from gearbox unit.
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