Mainjet for 102 Polini with 16.16 carburettor


What mainjet should i use for 102 Polini with 16.16 carburettor, Leo Vinche exhaust, and standard gearing and crank. Will not upgear, because i will use mostly offroad. Its for a Vespa 50 special scooter.The engine casings will be ported to fit the cylinder.

Best regards


Hi dude


Basically you can choose from 68-66 for the 16 SHB,  honestly, use the SHB 19.