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About the application:

Nº1 jetting Apk for Yamaha YZ 2T motocross bicycles (2020 engines included) 1990-2020 models This apk provides, using temperature, altitude, humidity, atmospheric pressure and your engine configuration and fuel kind, a suggestion about best jetting (carburetor configuration) and spark plug to use for Yamaha 2-strokes MX bicycles (YZ and PW models). This apk can receive automatically the position and altitude to receive the temperature, pressure and humidity from the nearest weather station thought internet. Internal barometer is used on supported devices for better precision. If more accuracy is required, a portable weather station can also be used. Application can run without GPS, WiFi and internet, in this case player has to give the weather data manually. • For each carburetor setup, the following values are given: main jet, needle kind, needle position, pilot jet, air screw position, throttle valve size, spark plug • Ok tuning for all these values • History of all your jetting setups • Graphic display of fuel mix quality (Air/Flow Ratio or Lambda) • Selectable fuel kind (gasoline with or without ethanol, Racing fuels accessible, for example: VP C12, VP 110, VP MRX02) • Adjustable fuel/oil ratio • Mix magician to receive the excellent mix ratio (fuel calculator) • Carburetor ice warning • Chance of use automatic weather data or a portable weather station • If you don't wish to share your place, you can manually choose any put in the globe, the carburetor setups will be adapted for this put • allow you use various measure troops: ºC y ºF for temperatures, meter and feet for altitude, liters, ml, gallons, oz for fuel, and mb, hPa, mmHg, inHg atm for pressures Valid for the following models from 1990 to 2020: • YZ65 • YZ80 • YZ85 • YZ112 • YZ125 • YZ125X • YZ134 • YZ144 • YZ250 • YZ250X • WR500 • PW50 • PW80 The application includes four tabs, which are described next: • Results: In this tab main jet, needle kind, needle position, pilot jet, air screw position, throttle valve size, spark plug are shown. These data are calculated depending on the weather conditions and the engine configuration given in the next tabs. This tab lets do a ok tuning adjustment for all this values to adapt to the concrete engine. Besides this jetting info, the air density, density altitude, relative air density, SAE - dyno correction factor, station pressure, SAE- relative horsepower, volumetric content of oxygen, oxygen pressure are shown too. On this tab, you can also share your settings with your colleagues, or add settings to your favorites. You can also see in a graphic form the calculated ratio of air and fuel (lambda). • History: This tab includes the history of all carburetor setups. If you change the weather, or engine setup, or ok tuning, the fresh setup will be saved in history. This tab also includes your favorite settings. • Engine: You can configure in this screen the info about the engine, that is, engine model, year, spark manufacturer, fuel kind, oil mix ratio. • Weather: In this tab, you can set the values for current temperature, pressure, altitude and humidity. Also this tab allows to use the GPS to receive the current position and altitude, and connect to an external service (you can select one weather data source from a few possible) to receive the weather conditions of the nearest weather station (temperature, pressure and humidity). Also, on this tab, you can manually choose any put in the globe, the carburetor setups will be adapted for this put. Moreover, on this tab, you can enable alerts about possible carburetor icing. If you have any doubt about using this Apk, please, contact us. We reply every question, and we take care of all comments from our players to test to improve our tool. We are also players of this application.