![]() However by adjusting these settings will help you achieve a more accurate calculation. The best idea is to order the replacement clip (part no P3420104) at the same time. Temperature celsius (fahrenheit) Calculated Main Jet Size Calculated Pilot Jet Size NOTE Advanced Options You can just go with the default settings here as all motorcycles are factory set to run at sea level and at 20 Celsius (68 Fahrenheit). ![]() If the needle is already in the lowest position and mix is already too rich (evident for instance if the Vespa sounds like a 4-stroke scooter when its slide is half open), then you should choose a thicker needle or a smaller mixer tube.Ĭonclusion: In this case, patient testing pays off as the carburettor can only work perfectly with a suitable needle. Under the seat you’ll find a spacious compartment which can hold a full-face helmet, while the lockable glove box, neatly integrated in the rear shield, provides safe storage for documents and important small items. The higher the clip snaps into place on the needle, the deeper it is immersed in the mixer tube and the leaner the mix is in the half throttle range. Plenty of thought has been given to delivering practicality beyond expectations. The needle also has various clip positions, with which it is possible to determine its position. The bigger the needle, the earlier the mix is enriched. As a rule, the following applies: The bigger the jet, the richer the mix that results. Each of the ranges has a specific effect on the composition of the mix. The needles differ in terms of their colour, pattern, internal coating and dimensions. Together with the mixer tube the jet needle regulates the composition of the mix in the partial load or half throttle ranges.
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