Jetting for Honda CRF 4T Moto 1.7

2002-2021 models

This application offers recommendations for optimal jetting and spark plug selection for Honda 4-stroke MX bikes (CRF-R and CRF-X models) equipped with Keihin FCR carburetors, based on factors such as temperature, altitude, humidity, atmospheric pressure, engine configuration, and fuel type.

The app can automatically retrieve weather data such as temperature, pressure, and humidity from the nearest weather station via the internet by utilizing the position and altitude information. For enhanced precision, supported devices can utilize an internal barometer, while users can also opt to input weather data manually in scenarios where GPS, WiFi, or internet access is unavailable.

• Provides values for main jet, needle type, needle position, pilot jet, air screw position, and spark plug for each carburetor configuration
• Allows fine-tuning of jetting setups
• Maintains a history of all previous jetting configurations
• Displays a graphic representation of fuel mix quality (Air/Flow Ratio or Lambda)
• Offers flexibility in selecting fuel types including gasoline variants and racing fuels like VP Racing T4, U4.4, MR12, Sunoco 260 GT Plus, and EX02
• Enables adjustment of fuel/oil ratio
• Features a mix wizard to calculate the perfect fuel mix ratio
• Includes a carburetor ice warning system
• Gives the option to use automatic weather data or a portable weather station
• Allows manual selection of any location worldwide to adapt carburetor setups accordingly
• Supports different units of measurement: ºC and ºF for temperatures; meter and feet for altitude; liters, ml, gallons, oz for fuel; and mb, hPa, mmHg, inHg atm for pressures

• CRF150R
• CRF250R
• CRF250X
• CRF450R
• CRF450X

• Results: Displays main jet, needle type, needle position, pilot jet, air screw position, spark plug based on provided data. Allows fine-tuning adjustments and provides additional information on air density metrics.

This tab enables easy sharing of settings and presents a graphic representation of the air-fuel ratio (lambda).

• History: Contains a log of all previously saved carburetor setups. It automatically records new setups when changes are made to weather conditions or engine configurations.
  This tab also includes a list of favorite settings.

• 
  

• Engine: Lets users input engine-specific details such as engine model, year, spark plug manufacturer, fuel type, and oil mix ratio.

• </ulist>
• 
  

• Weather: Enables users to set current temperature, pressure, altitude, and humidity values. This tab also offers GPS connectivity for real-time position tracking and allows access to external weather services for up-to-date weather conditions. Some devices may utilize a built-in pressure sensor for added accuracy.

• 
  
• </uitem>This tab also provides options to manually select a location worldwide for customized carburetor tuning. Furthermore, it features alerts for potential carburetor icing complications.