Main Jet for Vespa 50s (no kit) SHB 16.16 and exhaust Faco et3


I have order a new SHB 16.16 for my 50 S and an new exhaust Faco et3 banana (50cm3) on the SIP SHOP.

Do you know which size I must to use for the main jet on the SHB 16.16 ?

Available size :70-75-78-80-82-85-88-90-92-95-98



Hi, no more than 70, probably less (66-68...), you have to try it and verify with the plug color test.