# Jetting Max Kart for Rotax Max — Max performance for your kart

> Rotax Max engine jetting and spark plug recommendations based on weather. (iPhone/iPad app by ISEnet.)

- Source: https://appshunter.io/ios/app/jetting-max-kart-for-rotax-max/id811255761 (this page in markdown: same URL + `.md`)
- Developer: [ISEnet](https://appshunter.io/developer/811255764)
- Category: Sports
- Price: $7.99
- Age rating: 4+
- Requires: iOS 15.0 · 2 MB
- Languages: American English, Catalan, French (France), German (Germany), Italian, European Portuguese, Russian, European Spanish
- Released: 2014-02-07
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/jetting-max-kart-for-rotax-max/id811255761/reviews.md

## What is Jetting Max Kart for Rotax Max?

This app recommends the main jet, needle position and spark plug for karts with pre-2015 Rotax Max engines —Micromax, Micromax without carb restrictor, Minimax, Junior, Senior, DD2 and Supermax— from the weather conditions and your engine setup.

The conditions can be pulled from the nearest public weather station using your location, or typed in by hand: with no signal the app works exactly the same.

FOUR SCREENS

- Results: the recommended jet in large type, with the exact calculated value and the two jets it falls between, in green when the choice is clear and in amber when it sits halfway. Also the needle position, the spark plug, the air density, the density altitude and the relative horsepower. Fine tuning works in steps of 0.1 and tells you what each step achieves.
- Conditions: temperature, pressure, altitude and humidity, each with its own unit. When you pull them from the station you see which one answered, how far away it is and when the reading was taken, with a warning if it is more than 30 minutes old.
- Engine: class, K27 or K98 needle, 3.6 or 5.2 gr floats and pilot jet, float height, spark plug brand, 12.5 or 8.5 venturi, airbox, oil percentage and track type.
- Track logbook: every session with the circuit —picked from a catalogue of 112, with its altitude—, the conditions, what the app recommended against what you actually fitted, how it ran at the bottom, middle and top, the laps and the best time. Exports to CSV.

MORE

- Auto calibration: once the logbook has enough sessions, the app spots whether your engine systematically asks for more or less than the recommendation, and offers to set it as your default fine tuning.
- Share the setup as an image, to send it to the team group.
- Dark mode, system text size, VoiceOver, rotation and iPad.

UNITS

ºC and ºF; metres and feet; mb, hPa, mmHg and inHg; kg/m³, lb/ft³ and lb/gal.

PRIVACY

The app uses no trackers and collects no personal data. If you use location, the coordinates are sent only to look up the nearest weather station.

Available in Catalan, English, French, German, Italian, Portuguese, Russian and Spanish.

This app is NOT VALID for Rotax Max EVO engines, from 2015 onwards. For those engines you need Jetting for Rotax Max EVO Kart.

## Key features

- Jetting configuration recommendations
- Spark plug type suggestions
- Automatic weather data fetching
- Manual weather data input
- Engine and track configuration
- Fine-tuning adjustments
- Multiple unit support

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/jetting-max-kart-for-rotax-max/id811255761/reviews.md

### 2/5 — Ne tiens pas compte de la réglementation

*2021-04-18*

Impossible d’adapter à la réglementation!!

### 5/5 — Sehr zufrieden

*2020-07-20*

Alles super, komme sehr gut klar damit in Hobbybetrieb und kann mich nicht beschweren über große Abweichungen. Spiele da gerne etwas rum und Probier aber die App sagt eigentlich immer einen guten Wert

### 2/5 — Poor

*2018-02-12*

Not sure what the issue is. However the developer needs to look at these issues; recommendations won't reliably update to match the gps or manually input conditions, oil ratio cannot be set, it just changes randomly until it gets stuck at 0.1%. Not usable as it is. Developer needs to refund my money.

**Developer response:** Hello, those issues have been solved in the recent versions. Can you check it or contact us at mobile@isenet.es? Thank you.

### 3/5 — Mit Vorsicht zu genießen

*2016-08-24*

App zeigt nicht immer das Optimale Ergebnis an. Die Bedüsung muss immer höher eingesetzt werden als sie vorgibt.
Auch wenn die Werte nur als Basis dienen soll. 10 Sprünge bei der Düsenwahl ist Zuviel.

### 3/5 — Réglementation non intégrée

*2016-08-08*

Les suggestions ne tiennent pas compte de la réglementation en vigueur. Exemple iw31 pour un minime. Et je n'ai pas trouvé comment forcer l'indice de bougie. Idem pour le clip d'aiguille qu'on me suggère de placer en position 5 ... Pas très utile du coup.

## Frequently asked questions about Jetting Max Kart for Rotax Max

### What Rotax Max engine types does Jetting Max Kart support?

Jetting Max Kart supports Rotax Max Senior, Supermax, DD2, Junior, Minimax, and Micromax engines. The app allows you to select your specific engine type in the 'Engine' tab for accurate recommendations.

### How does Jetting Max Kart get weather data?

The app can automatically fetch current temperature, altitude, humidity, and atmospheric pressure from the nearest weather station using your device's location services and internet connection. Alternatively, you can manually input these values in the 'Weather' tab.

### Can I fine-tune the jetting recommendations in Jetting Max Kart?

Yes, the 'Results' tab allows for fine-tuning adjustments to adapt the recommendations to your concrete engine and track conditions. This fine-tuned value is stored for future sessions to ensure optimal performance.

### What units of measurement does Jetting Max Kart support?

Jetting Max Kart supports various units for temperature (ºC and ºF), altitude (meters and feet), and pressure (mb, hPa, mmHg, inHg, and atm). You can select your preferred units within the app's settings.

### Is Jetting Max Kart available on Android?

Based on the provided data, Jetting Max Kart is supported on iPhone, iPad, and iPod. Information regarding Android availability is not included in this data.

### How often is Jetting Max Kart updated?

The latest version of Jetting Max Kart is 1.8.1, which was last updated on February 29, 2024. This indicates a relatively recent update frequency.

### What is the age rating for Jetting Max Kart?

Jetting Max Kart has an age rating of 4+. This suggests it is suitable for a wide range of users, including younger individuals.

### Does Jetting Max Kart have ads?

No, Jetting Max Kart does not contain advertisements. The app is ad-free, providing an uninterrupted user experience.

## Version history (last 5 releases)

### 2.0 — 2026-08-14

The track logbook and auto calibration.

• Track logbook: save every session with the circuit, the conditions, the jet you actually fitted, how it felt, the laps and the best time. Exports to CSV.
• Auto calibration: with several sessions saved, the app spots whether your engine systematically asks for more or less than the recommendation, and offers to set it as your default fine tuning.
• Share the setup as an image, to send it to the team group.
• The recommended jet now shows both neighbours, in green when the choice is clear and in amber when the real value sits halfway between two.
• Fine tuning works in steps of 0.1 and tells you what each step achieves, instead of moving an abstract number.
• Weather and GPS were the same task split across two screens: they are now a single Conditions screen, showing when the reading was taken and warning you if it is more than 30 minutes old.
• The interface has been rebuilt: dark mode, system text size, VoiceOver, rotation and a proper iPad layout.
• The help on every screen has been rewritten and brought up to date.

The calculation model is unchanged: for the same conditions and the same setup, the recommended values are exactly those of the previous version.

### 1.8.1 — 2024-02-29

Small adjustment in the calculation model of micro and mini engines after testing on the dynamometer.

### 1.8 — 2023-10-30

Small adjustment in the calculation model of junior engines after testing on the dynamometer.

### 1.7 — 2019-02-05

Adapts the screen to iphone X, XR and XS.

### 1.6 — 2017-02-13

Fix error and changes in metadata

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All apps by ISEnet: https://appshunter.io/developer/811255764

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*