RD Vespa Carburettor Mixer Tube (SI 20.15-17 A-D/20.20-26.26E/G/H)
The mixer tube is found in the middle of the jet stack between the main jet and the air correction jet. This product regulates the mixture flowing through the carburettor at 1/4 & 3/4 opened throttle.
If you have an SI carburettor the mixer tubes are interchangeable, allowing more precise jetting for a better ride. The mixer tubes come in a range of sizes: BE1, BE2, BE3, BE3, BE4, BE5, BE6!
Comparison No. 0535301 28 (Del'orto)