Vespa Lambretta Dellorto PHBH 28 BS Style Vergaser, CS=36 Made by YSN
YSN PHBH 28 BS- CS=36mm - without vacuum/oil connection. The YSN PHBH 28 carburettor is almost identical to the original in all details. Only the gas slides are guided by a slightly longer centring pin in the carburettor.