With this you can change the fuel requirement. You need about 30% more fuel on ET85 than on Euro 98. These nozzles are also used in combination with big bore sets and other experiments or tuning projects.
The flexfuel comes at the location of the main nozzle of the first stage and the cap that is in front of it. A difficult point is bending the float so that it does not touch the nozzle needle and does not get stuck. It is easy to do, but requires some practice.
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