# Jetting for Honda CRF 4T bikes — SX, MX, off-road race bikes

> Carburetor jetting configuration tool for Honda CRF 2-stroke dirt bikes. (iPhone/iPad app by ISEnet.)

- Source: https://appshunter.io/ios/app/jetting-for-honda-crf-4t-bikes/id965893972 (this page in markdown: same URL + `.md`)
- Developer: [ISEnet](https://appshunter.io/developer/811255764)
- Category: Sports, Utilities
- Price: $2.99
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.1 · 4 MB
- Languages: American English, Arabic, Catalan, Czech, Danish, Dutch, Finnish, French (France), German (Germany), Greek and 21 more
- Released: 2015-02-22
- Data updated: 2026-08-14
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/jetting-for-honda-crf-4t-bikes/id965893972/reviews.md

## What is Jetting for Honda CRF 4T bikes?

This app will help you configure the carb of your 2-strokes Honda CRF bike (CRF 150 R, CRF 250 R, CRF 250 X, CRF 450 R) to improve its performance. Using temperature, altitude, humidity, atmospheric pressure and oil-mix ratio, the app will show you a recommendation about jetting to your specific bike, so it can be useful to get a spot-on configuration and adapt it to the weather changes.

In order to get the weather values, the application can use the GPS 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 and internet connection, in this case, the user has to give the altitude and weather data.

The application is made up of four tabs that are described next:
- Results: in this tab, the recommended main jet, needle type and clip position, slow jet and air screw position are shown. These data are calculated depending on the weather conditions and the engine configuration introduced in the next tabs. In addition, this tab lets to make a fine tuning adjustment to adapt to a concrete engine.
- Weather: you can set the values for current temperature, altitude, pressure and humidity. The values of this screen can be manually set or can be loaded by the application reading the data from the nearest weather station (from the GPS tab).
- Engine: you must set in this screen the information about the engine, that is, the model year, model and carburetor.
- GPS: this tab allows to use the GPS to get the current position and altitude, and connect to an external service to get the weather conditions of the nearest weather station (temperature, pressure and humidity).

The application can manage different measure units: meters and feet for altitude, ºC and ºF for temperatures, mb, hPa, inHg, mmHg for pressure.

Valid for following models and years:
- CRF150R: 2007 - 2024.
- CRF250R: 2004 - 2009.
- CRF250X: 2004-2019.
- CRF450R: 2002 - 2008.

## Key features

- Carburetor jetting recommendations
- Weather condition input (temp, altitude, pressure, humidity)
- GPS integration for weather data
- Manual weather data entry
- Support for multiple Honda CRF models and years
- Adjustable measurement units

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/jetting-for-honda-crf-4t-bikes/id965893972/reviews.md

### 5/5 — Easy Peezy

*2022-03-19*

Couldn’t find any information on jetting my 07 CRF 450 online. This app made it easy to do. I had all the right jetts on hand. Got them installed and my bike ran so much better than it did when I bought it.

## Frequently asked questions about Jetting for Honda CRF 4T bikes

### What Honda CRF models does Jetting for Honda CRF 4T bikes support?

Jetting for Honda CRF 4T bikes supports CRF150R (2007-2024), CRF250R (2004-2009), CRF250X (2004-2019), and CRF450R (2002-2008) models.

### Can Jetting for Honda CRF 4T bikes be used without an internet connection?

Yes, the application can run without GPS and internet connection. In this case, the user must manually input the altitude and weather data.

### What kind of jetting information does the app provide?

The app provides recommendations for the main jet, needle type and clip position, slow jet, and air screw position.

### Does Jetting for Honda CRF 4T bikes offer different measurement units?

Yes, the application supports various measurement units for altitude (meters, feet), temperature (ºC, ºF), and pressure (mb, hPa, inHg, mmHg).

### How accurate is the weather data obtained through GPS?

The app connects to an external service to get weather conditions from the nearest weather station when using GPS. The accuracy depends on the reliability of the external service and the proximity of the weather station.

### Can I fine-tune the jetting recommendations in Jetting for Honda CRF 4T bikes?

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

### How often is Jetting for Honda CRF 4T bikes updated?

The app was last updated on November 8, 2023, with version 1.5. Update frequency can vary based on developer plans and user feedback.

### What is the user sentiment for Jetting for Honda CRF 4T bikes?

Based on the available data, the app has a 5.0-star rating from 2 reviews, indicating very positive user sentiment.

## Version history (last 5 releases)

### 1.5 — 2023-11-08

Models updated to the year 2024.

### 1.4 — 2020-10-07

Minor changes in user interface.

### 1.3 — 2016-04-25

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

### 1.2.1 — 2015-10-17

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 2026-08-14.*