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- Jetting Rotax Max EVO Kart Vs. Rotax TRAX: Kart & Race Coach
Jetting Rotax Max EVO Kart vs Rotax TRAX: Kart & Race Coach Usage & Stats
This app provides, using temperature, altitude, humidity, atmospheric pressure and your engine configuration, a recommendation about jetting and spark plug to use for karts with Rotax 125 Max EVO (Micro Max Evo, Mini Max Evo, Junior Max Evo, Senior Max Evo, Max DD2 Evo) engines, which use a Dellorto VHSB 34 XS carb
This app can obtain automatically the position and altitude to get the temperature, pressure and humidity from the nearest weather station thought internet. Internal barometer is used on supported devices for better precision. Application can run without GPS, WiFi and internet
• For Mini, Junior, Max, DD2 you can choose which cylinder you are using. At the Grand Finals 2016, the cylinders for the Mini and Junior classes were updated. At the Grand Finals 2017, the cylinders for classes Max and DD2 were updated. New cylinders require richer carburation
• Two different tuning modes: "By regulations" and "Freestyle"!
• In first mode, the following values are given: main jet, spark plug, spark plug gap, needle type and position (including intermediate positions with washer), air screw position, idle screw position, optimal water temp, gear oil recommendation
• In second mode (Freestyle), the following values are given: main jet, spark plug, emulsion tube, needle, needle type and position (including intermediate positions with washer), throttle valve, idle jet (outer pilot jet), idle emulsifier (inner pilot jet), air screw position
• Fine tuning for all these values
• History of all your carburetor setups
• Graphic display of fuel mix quality (Air/Flow Ratio or Lambda)
• Selectable fuel type (VP MS93, gasoline with or without ethanol)
• Adjustable fuel/oil ratio
• Adjustable floats height
• Mix wizard to get the perfect mix ratio (fuel calculator)
• Carburetor ice warning
• Possibility of use automatic weather data or a portable weather station via Bluetooth: Kestrel DROP & 5x00, WeatherFlow WEATHERmeter, Skywatch BL
• If you don't want to share your location, you can manually select any place in the world, the carburetor setups will be adapted for this place
• let you use different measure units: ºC y ºF for temperatures, meter and feet for altitude, liters, ml, gallons, oz for fuel, and mb, hPa, mmHg, inHg for pressures
The application contains four tabs, which are described next:
• Results: In this tab two jetting setups are shown ('By regulation' and 'Freestyle'). These data are calculated depending on the weather conditions and the engine and track configuration given in the next tabs.
Also this tab lets do a fine tuning adjustment for all values for each carburetor config to adapt to the concrete engine.
Besides this jetting information, 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.
You can also see in a graphic form the calculated ratio of A/F (air and fuel) or Lambda
• History: This tab contains the history of all jetting setups. If you change the weather, or engine setup, or fine tuning, the new setup will be saved in history
• Engine: You can configure in this screen the information about the engine, that is, engine model, spark plug manufacturer, float type and height, fuel type, oil mix ratio and type of the track
• 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 get the current position and altitude, and connect to an external services to get the weather conditions of the nearest weather station.
In addition, this application can work with a pressure sensor built into the iPhone
For Rotax Max non-EVO Engine please try our other app: Jetting Rotax Max Kart
If you have any doubt about using this App, please, contact us. We answer every question, and we take care of all comments from our users to try to improve our software
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Feeling like your lap times have hit a wall? Unsure where to improve or just relying on guesswork? We’ve got you covered.
Rotax TRAX is your ultimate karting companion, offering real-time data analysis, AI coaching, and global competition. Track your performance, compare driver scores, and join virtual challenges.
Please note: To unlock the full TRAX experience, simply mount the TRAX device (sold separately at Rotax dealers) to your kart and start improving.
What Can TRAX Do for You?
- Compete: Challenge friends locally or rivals globally, no matter their kart or class.
- Compare: Track your racing performance instantly, and let our AI Coach show you how to improve.
- Connect: Join our global karting community and make new racing friends.
Crush the Competition's Driver Score
Empty track? Not anymore. Rotax TRAX enables you to compete against the karting community even with no one around. Regardless of class or equipment – the Driver Score is Rotax TRAX’ unique metric measuring solely your racing technique. Ready to take the challenge?
Meet Your AI Coach: Find Out What’s Holding You Back
Struggling to hit the apex? Not anymore. With the power of AI, inching closer to the apex by trial & error is a thing of the past. Rotax TRAX simulates the ideal lap. Then, it looks at your data to highlight areas for potential improvement. The average lap time improvement from day one is 0.6 seconds. Find out what‘s really keeping you from faster lap times!
Important Notes:
- Check kart requirements in our website’s FAQ.
- The pro version of the TRAX app requires the TRAX device.
- Ensure a stable GPS signal for accurate data on the track.
Terms & Privacy Policy:
https://www.rotax-racing.com/trax-terms-conditions
https://www.rotax-racing.com/privacy-policy
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Jetting Rotax Max EVO Kart vs. Rotax TRAX: Kart & Race Coach ranking comparison
Compare Jetting Rotax Max EVO Kart ranking trend in the past 28 days vs. Rotax TRAX: Kart & Race Coach
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Jetting Rotax Max EVO Kart vs. Rotax TRAX: Kart & Race Coach ranking by country comparison
Compare Jetting Rotax Max EVO Kart ranking trend in the past 28 days vs. Rotax TRAX: Kart & Race Coach
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January 16, 2026