Ducati Diavel Service Manual: Rectifier-regulator
The rectifier (1) is placed in the electrical components compartment.
The rectifier/regulator consists of an aluminium casing containing the diodes that rectify the current produced by the alternator. It also contains an electronic device that regulates the current supplied by the alternator in accordance with battery voltage.
If the battery is drained, the current has the value necessary to restore optimum operating conditions of the battery. In contrast, if the battery is fully charged, the current value will be lower.
Note
Control the charger current by using the dds diagnosis instrument (sect. 6 - 11, Diagnostic instruments).
Removal of the regulator 
Undo the two fixing screws (1) of the voltage regulator (2) and remove it together with them.
Important
Do not disconnect the battery cables when engine is running because this would cause irreparable damage to the regulator.
Refitting the regulator
Position the regulator (1) on the support.
Tighten the screws (1) to a torque of 10 nm +/- 10% (sect. 3 - 3, Frame torque settings).
Important
Do not disconnect the battery cables when engine is running because this would cause irreparable damage to the regulator.
Regulator fuse
The 30 a fuse is located inside the solenoid starter in the electrical components compartment.
Remove the fuse cap (a) to reach it.
A blown fuse can be identified by breakage of the inner filament (b).
Important
To avoid possible short circuits, replace the fuse in key off condition.
Warning
Never use a fuse with a rating other than the specified value. Failure to observe this rule may damage the electric system or even cause fire.
Alternator
It is equipped with a 12 v, 430 w generator, consisting of a fixed element
(stator, a) located on the generator cover and
of a movable element (rotor, b) fixed to the crankshaft.
Note
To chec ...
Electric starting system
Note
The references of the elements listed below are those of the "wiring
diagram", sect. 6 -1.
Electric starting system
The key components of the electric starting system are a solenoid (6) and ...
Other materials:
Refitting the clutch transmission unit
Position pipe (4) on the clutch slave cylinder (r).
Position the two seals (19) and tighten the screw (18) to a torque of 23 nm +/-
10% (sect. 3 - 3, Frame torque settings).
Refit the bleed valve (17) and the dust gaiter (16).
To position the pipe retaining clamps (4) refer to the table on ...
Refitting the air filters
Apply universal sealant in the air duct (2) and (6) groove (d).
Fit seal (7) in the groove (d) having care to place it correctly in the relevant
seat so as to avoid abnormal wrinkles.
Pull out the filter cartridge (1) from the seat in the airbox.
Position the rh air duct (2).
Start ...
Reassembly of the crankcase halves
The crankcase halves must be in good condition and perfectly clean. The
mating surfaces must be perfectly flat and free
from burrs.
Overhauling the alternator-side crankcase half
The following parts must be present on the internal side of the crankcase
half:
Gearbox secondary shaft bearin ...