Dellorto Racing carburettors PHBG 19mm Type BS without oil and vacuum port. This carburettor is for use with pre-mix. 19mm carburettors are usually sufficient for all 70cc tuning applications. This silver-coloured version still has a relatively neutral look. Easy to tune carburettor in the usual Dellorto quality. Connection engine: 25mm connection air filter side: 32mm choke jet: M5 # 60 Jet: M6 272AU main jet: M5 # 085 idle jet: M5 # 50 Floats: 94501 / 4.0g carburettor slider 40 (metal version) needle choice: W7