Flywheel boss set -BGM PRO - to convert type PK-XL flywheel to small taper Ø19mm oil seal, Vespa V50, 50N, SS50, 50SR, Sprinter, V90, SS90, 90 Racer, V100, PV125, ET3

With the conversion kit, a Vespa PK-XL pole wheel with blunt cone (Ø20mm oil seal) can be converted to the pointed cone of the crankshafts with Ø19mm oil seal. In conjunction with an ignition base plate with pickup, an electronic ignition can thus be installed on the V50 engines.