OEM Aprilia Crankshaft Outer (Clutch & Stator Side) Main Bearing Half Shell, Black - 8571320N
Sold as a half shell. Order quantity 2 to do an entire journal. Order quantity 4 to do an entire engine.
Note that these bushings are the LH and RH outboard bushings. The bushings that go at the center of the crankshaft are sold in Black, Green, or Yellow specification.