Sport 25 mm connection engine: 31mm connection filter: 39mm rubber connection TUNING SPORT – high-performance Product description An economically priced carburettor ?C perfect for road or low-cost tuning. The carburettors belonging to the DELL’ORTO PHB series are the first choice for mid-range motor tuning projects. They belong to the ‘drum carburettors’ (with a rounded throttle/choke) and are available with choke diameters between 24 and 30mm. The DELL’ORTO PHB carburettors are the right choice for tuners who wish to extract a little more performance from their scooters motor without having to spend too much of their hard-earned cash! Regrettably these DELL’ORTO carburettors are not always immediately available. There is however a more economically priced alternative available from YSN. Their carburettors are almost identical in design and function to the DELL’ORTO items and were conceived for similar fields of use. The individual peripheral parts and adjustment components are al