While Dellorto jets make numeric sense (a size 125 has a larger bore than a 120, which in turn is larger than a 115 for example), the needle names donвЂ™t the X7, X13 and X2 range from lean to rich in that order. Just the other week I was re-configuring a 28mm version for an engine that had previously suffered wear and manifold splits, and within a short space of time I was back on the road with performance and fuel economy as they should be.ДЄnyway, this week I found a social media post buried somewhere about a new range of needles produced by MB Scooters. the range ofВ jets, needles and atomisers) are pretty vast. The Italian carbs seem so much more straightforward and the options for tweaking and fettling (i.e. IвЂ™ve tried other carbs, mainly from Japanese manufacturers, but have never really got on with them. The PHBH model of Dellorto is a popular aftermarket option for many of us who have tuned our classic scooters in one way or another.

Well, understand to the best of my ability that is. Lambretta and Vespa scooters emerged from their Italian factories with Dellorto carburettors fitted as standard, and despite an Amal on my liquid-cooled TS1, I still know, love and understand a Dellorto carburettor.

Dellorto phbh 28 diagram