Ducati Diavel Workshop Manual page 824

Crankcase assembly: crankshaft/connecting rods assembly
The connecting rod is supplied in two size classes A and B relative to the big end diameter (Sect. 3 - 1.1, Crankshaft) as
punch marked on the side of the cap.
It is preferable to use crankshafts and connecting rods of the same size class.
Renewal of the small end bushing
To remove the worn bushing, use a suitable punch and a press.
Drill lubrication holes into the new bushing in correspondence with the existing lubrication holes on the connecting rod
small end.
Now ream out the bushing until the inside diameter (D) is 20.035 to 20.045 mm.
Connecting rod bearings
It is good practice to renew the bearings (3) each time the engine is overhauled.
Replacement bearings are supplied ready for assembly and they must not be reworked with scrapers or emery cloth.
The bearings may belong to two different size classes, each identified by a specific colour (YELLOW and BLUE).
The bearings are comprised of an external steel ring, the inner face of which is electroplated with a lead-based compound.
The table shows the appropriate bearings to be fitted according to the size class of the crankshaft and connecting rod.