Dellorto SI 24 / 24G carburettor suitable for Vespa PX 125 T5. For separate lubrication. OEM number for comparison purposes: 285900 port engine: 24mm inside choke jet: SI 20-24 PX / PE # 60 Jet: SI BE4 M6 # 120 main jet: Vespa SI # 120 main air jet: SI 24 # 120 idle jet: SI 24 # a 50/100 float: 4567 / 3.7 g carburettor slide: flat float needle: spring SI 20/24 4.5mm carburettor gasket set: SI carburettor filter: sieve SI 20/24