Flywheel boss set -BGM PRO - to convert type Vespa PK-XL flywheel to small taper Vespa Sprint150 (VLB1T), Sprint Veloce, GT125 (

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 of the type Vespa Sprint. In conjunction with a Vespa PX ignition base plate with pickup can thus be installed an electronic ignition on the engines.