Description

High Performance Dellorto Style

Si PILOT JET

– SIZE 55/160 –

VESPA PX

HIGH PERFORMANCE LONG DELLORTO Si PILOT JET - SIZE 55/160 - VESPA PX. .Dellorto Si type pilot jets come in 2 versions, long for the Vespa large frame, Cosa, and PX models, and the shorter version is used on the Vespa T5. These high performance jets are manufactured with a shallower 65 degree angle on the feed in on both the air and fuel side on the jets (standard is quite a sharp 120 degree feed in) This give better more efficient passage to the air and fuel with less turbulence and more consistent delivery especially at higher RPM, yes the pilot circuit is still active at high RPM delivering fuel alongside the main jet circuit . .This jet is the long version, these jets control both the fuel and air delivery to the pilot circuit, the smaller number is the fuel hole size and the larger number is the air hole size, they are available in a wide range of sizes just search for 9892 to see the whole range of long PX pilot jets and search 11868 to see the range of shorter T5 pilot jets