Ducati Diavel
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Ducati Diavel Service Manual: Shimming the shafts

Before assembling the crankcase halves, calculate the shims required to obtain the correct end float of the crankshaft and gearbox shafts.

To determine the correct shim thickness proceed as follows.

Shimming the crankshaft

Shimming the crankshaft

Shimming the crankshaft

Add 0.30 Mm preload for crankshaft axial bearings to bed in correctly into their seats (inner rings seated inside outer ring).

Thus, we obtain: sa=la1+la2+0.30-La.

To calculate the thickness of each shim note that: sa=sa1+sa2 where "sa1" and "sa2" represent the shims for the clutch-side crankcase half 1 and the alternator-side crankcase half 2.

Considering the alignment of the shaft, this gives: sa1=la1+0.15-La/2; and finally, the second shim thickness: sa2=sa-sa1.

Shimming the crankshaft

Shimming the crankshaft

In addition to the above procedure, the following is a practical shimming method, providing a guide on how to calculate the crankshaft shim thickness accurately.

Install a shim of minimum thickness (1.90 Mm) on each side of the crankshaft to prevent contact between the crankshaft web and the crankcase.

Install the crankshaft and assemble the two crankcase halves.

Fit four m8 screws in the seats indicated in figure and tighten them to a torque of 19 nm (min. 17 Nm - max. 21 Nm) (sect. 3 - 3, Engine torque settings).

Shimming the crankshaft

Place a dial gauge (c) with magnetic base on a support plate fixed to crankcase.

Bring the stylus into contact with the end of the crankshaft and set the dial gauge to zero in this position.

Shimming the crankshaft

Place a lever (d) between crankcase and crank web of the crankshaft pushing towards dial gauge.

Note on the dial gauge the total clearance and add a preload of (0.30 Mm) plus the thickness of the shims used (1.90X2=3.8 Mm).

Divide the resulting value by two to obtain the thickness of the shim packs to be installed at either end of the crankshaft.


After assembling the crankcase halves, the crankshaft should turn with some interference in the new bearings.

Shimming the crankshaft

Shimming the gearbox shafts

The following thickness spacers are supplied as spare parts.

Shimming the gearbox selector drum

The following thickness spacers are supplied as spare parts.

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 pa ...

Reassembly of the crankcase halves
If removed, apply threadlocker on the screw (36), insert it with the washer (37) on the crankcase half and tighten it to The torque of 8 nm (min. 7 Nm - max. 9 Nm) (sect. 3 - 3, Engine torque sett ...

Other materials:

Bleeding of the abs hydraulic system
If some "sponginess" is detected on the brake control, due to air bubbles in the system, bleed the system, as indicated in sect. 4 - 3, Changing the brake fluid. Before bleeding a brake pump, move back the calliper pistons, as indicated in (sect. 4 - 3, Changing the brake fluid) to Drain in ...

Removal of the rear brake calliper
Important The brake manufacturer advises against any servicing of the internal components of brake callipers or the master cylinder. Incorrect overhaul of these critical safety components can endanger rider and passenger safety. Before removing the parts in question, you must first carry ou ...

Refitting the seat
Note Apply recommended grease to the hole (a) of latch (6). Fit the seat (1) as follows: insert the tabs (b) (on the front side) under the rubber pads (c) of the gloves compartment; then push the seat rear side until hearing the lock latch click. ...

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