Jetting KTM 2T Moto Bikes

JetLab, LLC

About this app

Nº1 jetting App for KTM 2T Moto Bikes (2025 engines included)

1998-2025 models
This app is using temperature, altitude, humidity, atmospheric pressure and your engine configuration for calculate optimal jetting (carburetor configuration) and spark plug to use for KTM 2-strokes MX, Enduro and Freeride bikes (SX, SXS, XC, XC-W, EXC, MXC, R models).

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. If more accuracy is needed, a portable weather station can also be used. Application can run without GPS, WiFi and internet, in this case user has to give the weather data manually.

• For each carburetor configuration, the following values are given: main jet, needle type, needle position, pilot jet, air screw position, throttle valve size, spark plug
• Fine tuning for all these values
• History of all your jetting setups
• Graphic display of fuel mix quality (Air/Flow Ratio or Lambda)
• Selectable fuel type (gasoline with or without ethanol, Racing fuels available, for example: VP C12, VP 110, VP MRX02)
• Adjustable fuel/oil ratio
• Mix wizard to get the perfect mix ratio (fuel calculator)
• Carburetor ice warning
• Possibility of use automatic weather data or a portable weather station
• 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

Valid for the following 2T models from 1998 to 2025:
• 50 SX
• 50 SX Mini
• 50 Supermoto
• 60 SX
• 65 SX
• 65 XC
• 85 SX
• 105 SX
• 125 SX
• 125 SXS
• 125 EXC
• 125 XC-W
• 125 MXC
• 125 EXE
• 125 Supermoto
• 144 SX
• 150 SX
• 150 XC
• 150 XC-W
• 200 SX
• 200 EXC
• 200 XC
• 200 MXC
• 200 EGS
• 200 XC-W
• 250 SX
• 250 SXS
• 250 XC
• 250 XC-W
• 250 EXC
• 300 EXC
• 300 XC
• 300 XC-W
• 300 MXC
• 380 SX
• 380 EXC
• 380 MXC
• Freeride 250 R

The application contains four tabs, which are described next:

• Results: In this tab main jet, needle type, needle position, pilot jet, air screw position, throttle valve, spark plug are shown. These data are calculated depending on the weather conditions and the engine configuration given in the next tabs.
This tab lets do a fine tuning adjustment for all this values 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.
On this tab, you can also share your settings with your colleagues.
You can also see in a graphic form the calculated ratio of air and fuel (lambda).

• History: This tab contains the history of all carburetor setups.
This tab also contains your favorite carburetor configs.

• Engine: You can configure in this screen the information about the engine, that is, engine model, year, spark manufacturer, fuel type, oil mix ratio.

• 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 service (you can choose one weather data source from several possible) to get the weather conditions of the nearest weather station (temperature, pressure and humidity).


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. We are also users of this application.

What's new

• Now you can choose models from 1998 to 2025 year
• Also new models have been added. Such as 50 SX, 50 SX Mini, 50 SX Pro Senior, 50 SX Pro Junior, 50 Senior, 50 Supermoto, 60 SX, 125 MXC, 125 EXE, 125 Supermoto, 150 XC-W, 200 SX, 200 MXC, 200 EGS, 200 XC-W, 250 MXC, 250 XC-W, 300 XC-W, 380 SX, 380 EXC, 380 MXC
• New type of fuels have been added: VP Racing C12, VP Racing 110, VP Racing MRX02
• Now you can see size of Throttle Valve for each carburation recommendation on the 'Results' tab