Ball bearing for the alternator side of the Lambretta Li, SX, TV. Ball bearing for the alternator side T5. Ball bearing for the alternator side of the Vespa GS 160 / 4 and the Vespa SS 180. For installation, it is best to place the cold bearing (overnight in the freezer) in the housing that has been carefully warmed up with the blowtorch. Depending on the fit, first find a suitable driver that is supported on the outer ring.