# Jetting for Honda CR 2T — Max performance for your CR

> Carburetor jetting optimization for Honda CR 2-stroke motorcycles. (iPhone/iPad app by ISEnet.)

- Source: https://appshunter.io/ios/app/jetting-for-honda-cr-2t/id965410689 (this page in markdown: same URL + `.md`)
- Developer: [ISEnet](https://appshunter.io/developer/811255764)
- Category: Sports, Utilities
- Price: $2.99
- Rating: 2.80/5 from 4 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 3 MB
- Languages: American English, Arabic, Catalan, Czech, Danish, Dutch, Finnish, French (France), German (Germany), Greek and 21 more
- Released: 2015-02-18
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/jetting-for-honda-cr-2t/id965410689/reviews.md

## What is Jetting for Honda CR 2T?

This app provides, using temperature, altitude, humidity, atmospheric pressure and oil-mix ratio, a recommendation about the jetting configuration to use for Honda CR 2-stroke motocross bikes (CR80, CR85, CR125, CR250 and CR500), from 1986 to the last two-strokes Honda built, in 2007.

Every recommendation starts from the reference setup for that model and model year, and is corrected by the air density of your conditions. It is not a rule of thumb from a forum: it is a starting point worked out for the day in front of you.

In order to get the weather values, the application can use the location service (GPS or WiFi) to obtain the position and altitude, and the network connection to get the temperature, pressure and humidity from the nearest weather station. Nevertheless, the application can run without GPS, WiFi and internet connection, in this case, the user has to give the weather data.

What you get:
- Main jet, needle type and clip position, slow jet and air screw, calculated from the air density for your conditions, in the sizes that actually exist for your carburettor -Keihin PE and PJ, Mikuni TMX-.
- Weather from the nearest station in one tap, or typed in by hand when there is no coverage.
- A logbook of your rides: what the app recommended, what you actually fitted, and how it ran, rated separately for the low, mid and high circuits. Export as CSV or move it to another phone.
- Fine tuning to adapt the recommendation to your own engine.
- Air density and density altitude, always on screen.

The app lets you use different measure units: ºC and ºF for temperatures, meters and feet for altitude, mb, hPa, mmHg and inHg for pressures, and kg/m³, lb/ft³ and lb/gal (US) for air density.

No ads, no tracking, no account. Every calculation runs on your device, so the app works at the track with no coverage: you only need a connection if you want to pull the weather from the nearest station.

Valid for the following models:
- CR80: 1995-2002.
- CR85: 2003-2007.
- CR125: 1986-2007.
- CR250: 1986-2007.
- CR500: 1986-2001.
* Please note that the application is valid only for the carburetted two-stroke CR. It does not cover the four-stroke CRF.

## Key features

- Carburetor jetting recommendations
- Weather condition adaptation
- GPS for location and altitude
- Manual weather data input
- Engine model and year configuration
- Adjustable measure units

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/jetting-for-honda-cr-2t/id965410689/reviews.md

### 1/5 — No access to CR 85

*2024-11-20*

It’s advertised it has CR85 available it doesn’t nor can you access other carburettors it’s a terrible app not worth any money

### 5/5 — Bien

*2019-05-17*

Ras.

**Developer response:** Bonjour, contactez-nous à l'adresse mobile@isenet.es pour résoudre votre problème. Salutations.

### 2/5 — Please add more features to the CR app

*2017-05-15*

I only can choose the mikuni and most people run keihin PWK 38 Airstriker on cr250

The fuel mix preset should be optional to use 40:1 32:1 50:1 etc since this is actually more useful than a simple percentage which doesnt make much sence for people running 2t

Also, this simple data provided within the app, can be easily found nowdays in the internet in less than a couple of minutes and the reason I bought this app, is to get the next level of jetting data that will allow me to add features and options and get accurate jetting sugestions

If you want this app to be useful, please add other carbs. Big bore kits jetting and woods/gnarly pipe setups and things like that

Thanks

**Developer response:** Thank you for your comment. We're working in an update that will have more options and carbs. Best regards.

## Frequently asked questions about Jetting for Honda CR 2T

### What Honda CR models does Jetting for Honda CR 2T support?

Jetting for Honda CR 2T supports CR80 (1986-2002), CR85 (2002-2007), CR125 (1986-2007), CR250 (1986-2007), and CR500 (1986-2001) models.

### How does Jetting for Honda CR 2T use weather data?

The app can use GPS to get your location and altitude, then connect to the internet for local weather data (temperature, pressure, humidity). Alternatively, you can manually input these values.

### Can I fine-tune the jetting recommendations?

Yes, the 'Results' tab allows for fine-tuning adjustments to adapt the recommended jetting to your specific engine's needs.

### What units of measurement does Jetting for Honda CR 2T support?

The app supports various units for altitude (meters, feet), temperature (ºC, ºF), and pressure (mb, hPa, inHg, mmHg).

### Does Jetting for Honda CR 2T require an internet connection to work?

No, the application can run without GPS and internet connection. In such cases, you will need to manually provide the altitude and weather data.

### What information do I need to input about my engine?

You need to provide the model year, model, carburetor type, and the oil mix ratio you are using for your Honda CR bike.

### How often is Jetting for Honda CR 2T updated?

The latest version is 1.4, and it was last updated on November 6, 2023. Updates typically address bug fixes and performance improvements.

### What is the price of Jetting for Honda CR 2T?

Jetting for Honda CR 2T is a paid application priced at $2.99.

## Version history (last 5 releases)

### 1.5 — 2026-08-19

New in this version: a logbook, and the weather station moved into the Conditions screen.

• Logbook. Save any calculation and write down afterwards what you actually fitted and how it ran. Rate the low, mid and high circuits separately, note the place, and export everything as CSV or share a copy to move it to another phone.
• The GPS tab is gone. Asking the nearest weather station for temperature, pressure and humidity now happens inside Conditions, which is where those values are used. No more going back and forth.
• Fixed: asking for your location did not work at all. The app used a delegate method Apple retired in iOS 6, and the permission entry was missing from the app itself.
• The weather station request no longer blocks the interface, and station names are no longer truncated.
• Fixed: on the Results screen the Help, + and ... buttons sat on top of the first boxes, and the boxes did not stretch to the width of modern iPhones. The layout now works itself out from the safe area.
• New launch screen with the app logo. The old one was a screenshot of the app with made-up figures, and it no longer looked like the current interface.
• All the help texts rewritten screen by screen: they still described a GPS tab that no longer exists.
• Fixed: the "more apps" screen showed titles without icons.

### 1.4 — 2023-11-06

Minor adjustment in the calculation model after testing on the dynamometer.

### 1.3 — 2016-04-23

This app has been updated by Apple to display the Apple Watch app icon.

Improved service for obtaining weather information.
Minor changes in user interface.

### 1.2.1 — 2015-10-19

Fixed display bug and network access error in iOS9.

### 1.2 — 2015-08-01

Fixed issue in GPS functionality.

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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.*