Dellorto carburettor SHBC 19/19 suitable for Vespa 50R, S, Special, 125 Primavera 125 ET3. OEM number Piaggio and Vespa for comparison purposes: 196227 connection engine: 23mm studs distance: 51mm choke jet: SHB / VHS # 60 main jet: M5 # 074 idle jet: M5 # 45 Floats: 6122.2 / 3.5g carburettor slide: 10569.1 float needle: Type PHBG, SHA, SHB, SHBC carburettor filter: sieve type PHBL, PHBH, PHF, SHBC