Kodiak Research Ltd. Bing Carburetor Main Jet Conversion Chart Bombardier Rotax has recently published an updated Bing Jet Chart and Main Jet conversion chart. The Bing Jet Chart Common Application chart shows each engine and the stock carburetion setting at sea level. If you live other than at sea level or in a hotter climate, then you must refer to the Main Jet Conversion Chart to calibrate for altitude and temperature.
Air density decreases with decreasing pressure and increasing temperature.
If an engine is operated at higher elevation, the weight of the aspirated air decreases, whereas the aspirated fuel quantity remains practically the some. The consequent loss in performance cannot be compensated for by different carburetor settings. To adjust the carburetor, in general a different main jet size is sufficient. By using the conversion chart, going to the approximate altitude of 6,500 feet and using the temperature of 50 degrees fahrenheit, you can see we have a multiplier of .95 and come up with our recommended jet of 171. Leading Edge Air Foils, LLC Store Front Page Rotax aircraft engines, Kodiak Research Ltd.