Vespa pk50s 16/16 shb jet size help

Hi I replaced my 16,10 with a 16,16 shb carb. The motor is stock pk50s,What size jets should I use. Thank you

It came with 

Main 70

Idle 38

Starter 50


your size is 60-62 for the mainjet.

cheers Jan

Versuchs mal in dem Forum Deiner Landessprache.



idle and starter jets are good. Maybe also the 70 mainjet could be ok, perhaps because you have the stock 50cc you'd need a 68 or 66 if also exhaust is the stock. With a more "open" exhaust I'd use the 70 you already have.


I don't understand sorry