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 devicesDashes shown instead of speed indication or indicated speed is incorrect
   Fault codes
Dds: speed sensor diagnosis -> max. Speed (max. Speed error - signal not 
correct) - minimum speed (min speed error -
signal not correct) - congruence (correlation speed error - signal not correct).
Dashboard: the error "speed sensor" is shown on the service display. The eobd 
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Traction control (dtc) deactivated
   The activation of this (amber yellow) "warning" indicates
that dtc (ducati traction control) has been turned off.
 Note
In this case, ducati recommends being very careful
when riding as the vehicle behaviour will be different in
comparison to when operating with the traction control
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Inspection of the gear selector forks
   Visually inspect the gear selector forks. Bent forks must be renewed as they 
may lead to difficulties in gear changing or
may suddenly disengage when under load.
Use a feeler gauge to check the clearance of each fork in its gear groove.
If the service limit has been exceeded, check whether  ...