# Jetting Yamaha YZ 2T Moto — for YZ65, YZ85, YZ125, YZ250 > Yamaha 2-stroke MX bike jetting and spark plug recommendations. (iPhone/iPad app by Ballistic Solutions LLC.) - Source: https://appshunter.io/ios/app/jetting-yamaha-yz-2t-moto/id1462341556 (this page in markdown: same URL + `.md`) - Developer: [Ballistic Solutions LLC](https://appshunter.io/developer/1611909747) - Category: Sports, Utilities - Price: $5.99 - Rating: 4.60/5 from 16 App Store ratings · 29 written reviews indexed - Age rating: 4+ - Requires: iOS 9.0 · 38 MB - Languages: Russian, Vietnamese, American English, Arabic, Hungarian, Dutch, Greek, Danish, Hebrew, Indonesian and 22 more - Released: 2019-05-03 - Data updated: 2026-09-09 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/jetting-yamaha-yz-2t-moto/id1462341556/reviews.md ## What is Jetting Yamaha YZ 2T Moto? 1990-2023 models This app provides, using temperature, altitude, humidity, atmospheric pressure and your engine configuration and fuel type, a recommendation about best jetting (carburetor configuration) and spark plug to use for Yamaha 2-strokes MX bikes (YZ and PW 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 setup, 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 atm for pressures Valid for the following models from 1990 to 2023: • YZ65 • YZ80 • YZ85 • YZ112 • YZ125 • YZ125X • YZ134 • YZ144 • YZ250 • YZ250X • WR500 • PW50 • PW80 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 size, 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, or add settings to your favorites. 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. If you change the weather, or engine setup, or fine tuning, the new setup will be saved in history. This tab also contains your favorite settings. • 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). In addition, this application can work with a pressure sensor built into the iPhone. You can see if it is available on your device and turn it on or off. Also, on this tab, you can manually select any place in the world, the carburetor setups will be adapted for this place. Moreover, on this tab, you can enable alerts about possible carburetor icing. 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. ## Key features - Jetting recommendations (main jet, needle, pilot jet, etc.) - Spark plug suggestions - Automatic weather data integration - Manual weather data input - Fuel mix quality graphic display - Selectable fuel types and oil ratios - Carburetor ice warning ## Chart rankings - #47 in Top Paid · Sports (US App Store) ## Recent user reviews (10 of 29) All indexed reviews: https://appshunter.io/ios/app/jetting-yamaha-yz-2t-moto/id1462341556/reviews.md ### 5/5 — Ottima *2026-05-06, version 2.7* Salve volevo sapere se va bene anche per le moto del 2026 ? Grazie aspetto vostre notizie 🥰 comunque lapp è una bomba scusate volevo chiedere se uno cambia la marmitta sana come faccio a capire quali getti mettere se lapp nn ha una opzione di cambio marmitta ? Potete aggiungere questa opzione grazie ### 3/5 — Некорректные данные *2025-05-12, version 2.7* Для Yamaha Yz 125 2010 требует неоригинальную иглу от ktm 6bfy44-74 ### 3/5 — Дополните параметры *2025-05-11, version 2.7* Для yz125/144 рекомендует настройки для иглы 6BFY44-74, но это не стоковая игла(6CHY5-80), она от KTM 125/150. Добавьте возможность выбора иглы ### 5/5 — Well, worth 6 bucks wow !! *2025-04-19, version 2.7* I’ve been using this app for my Yamaha’s for probably five years now I love it ! I’m constantly sending it to my friends and they’re always asking me how my bikes run so crispy! I highly recommend this ! ### 5/5 — New Phone - How to Transfer app? *2025-02-12, version 2.7* Unable to email through app because it says email is not configured ### 5/5 — YZ250 Dailed in. *2024-04-08, version 2.6* App work great. My YZ has a porting and polish performance head. Pipe and silencer. The jetting recommendation made it the cherry on the top of my build highly recommended. I doubled checked specs from Pro Circuit , FMF and JD jetting. To make sure and it was spot on. Worth everything penny. ### 4/5 — Pump gas option needed! *2023-09-14, version 2.6* I live in NV, and I would love to see normal pump Gas options on the fuel list, instead of only specialty fuels. Impressed with the layout and info given. Very clear and precise. ### 5/5 — Best $6.00 I’ve Ever Spent *2023-08-12, version 2.6* I’ve been riding & racing motorcycles for almost 50 years. This takes all the guess work out of jetting my YZ250 2-Smoker. I actually thought I was pretty good at setting up my bike. This made it even better. What I like most is being able to use a specific location (as in going to a new place to ride, with different elevation, weather, humidity, etc). I didn’t leave this review until I’ve used this for 4 different riding locations, and changed jetting slightly for 3 of them. Made a significant jetting change for one of the locations, but what they all had in common, bike ripped. Clean jetting, no pipe drool, super crisp! Thankfully I have tons of mains and pilot jets. 3 different heat ranges on spark plugs and several carb needles. If you have what’s needed, your bike will run perfect! ### 2/5 — Jetting Yamaha app *2022-08-05, version 2.5* Would like to see more data and support. For instance im using an older engine, but with keihin pwk. But I have to choose a 2002. And doesnt pwk make more than one mm size? Will this app continue to get updates and data entries? Im also running a br8eg, but It auto fills in a ngk br10eg. I would have loved to give this 3 stars, but at this point im saving most people from spending the money cause I havent seen or heard of any further updates. Seems un-completed and leaves a lot to desire. ### 5/5 — Love it *2022-07-12, version 2.5* Super useful app. ## Frequently asked questions about Jetting Yamaha YZ 2T Moto ### What Yamaha motorcycle models does Jetting Yamaha YZ 2T Moto support? Jetting Yamaha YZ 2T Moto supports Yamaha 2-stroke MX bikes from 1990 to 2023, including models like YZ65, YZ85, YZ125, YZ250, WR500, PW50, and PW80. ### How does Jetting Yamaha YZ 2T Moto get weather data? The app can automatically obtain local weather data like temperature, altitude, humidity, and atmospheric pressure via the internet using GPS. It can also use an internal barometer on supported devices for better precision or allow manual input. ### Can I fine-tune the jetting recommendations in Jetting Yamaha YZ 2T Moto? Yes, the app allows for fine-tuning of all recommended carburetor setup values, including main jet, needle position, and air screw position, to adapt to your specific engine. ### Does Jetting Yamaha YZ 2T Moto have ads? No, Jetting Yamaha YZ 2T Moto is a paid application and does not contain advertisements. ### What is the price of Jetting Yamaha YZ 2T Moto? Jetting Yamaha YZ 2T Moto is available for a one-time purchase of $5.99. ### What units of measurement does Jetting Yamaha YZ 2T Moto support? The app supports various units for temperature (ºC, ºF), altitude (meters, feet), fuel (liters, ml, gallons, oz), and pressure (mb, hPa, mmHg, inHg, atm). ### How often is Jetting Yamaha YZ 2T Moto updated? The latest version, 2.7, was last updated on January 23, 2025, indicating active development and support for the application. ### Is Jetting Yamaha YZ 2T Moto available on Android? Based on the provided data, Jetting Yamaha YZ 2T Moto is supported on iPhone, iPad, and iPod, suggesting it is an iOS-exclusive application. ## Version history (last 5 releases) ### 2.7 — 2025-01-23 • Added new 2023 models • Added new feature: get weather (temperature, pressure, humidity) via Bluetooth using weather stations: Kestrel DROP, Kestrel 5x00, WeatherFlow WEATHERmeter, Skywatch BL • Added new feature: added the ability to calibrate the barometer built into your phone or tablet (go to the “Settings“ tab, then “Measurement units“) • Added new feature: added various utilities (unit converters) (go to the “Settings“ tab, then “Utils“) • We have improved our weather calculator significantly. Now you can manually select which type of atmospheric pressure you are working with (for example if you use portable barometers, weather stations): - sea level pressure QNH - sea level pressure QFF - station pressure (barometric pressure) • At customers request, we have added a new carburetion option, from 2019 you can choose which needle you will use for YZ85 model (stock (NAPG) or old (NBKF)) • Some carburation recommendations have been revised for better performance. Therefore, we strongly recommend that you check the fine tuning sliders, you may need to change them • New models are added - PW50 (Y-ZINGER), PW80 (Y-ZINGER), YZ125X, YZ250X • On the results tab, click on the drop-down menu 'Weather (AirLab)', new data for tuners are available: Air Density, Relative Air Density, Density Altitude, Station Pressure, SAE - Dyno Correction Factor, SAE - Relative Horsepower, Volumetric Content Of Oxygen, Oxygen Pressure • Added a new value for each carburetor configuration on the 'Results' tab: Throttle valve size • Improved functionality for the feature 'Weather for custom location'. We added a search bar where you can enter the location name. Search places easier and faster now • We added new fuels, this is gasoline with ethanol. It require a richer carburation than regular premium gasoline • Improved functionality and accuracy of fuel calculator • Bug fixes for 'share setup with friends' feature • Fixes for showing 'Carburetor icing alert', now it doesn't overlap other content • We reworked the altitude determination algorithm for the 'weather for custom location' feature. We hope that now, if you manually selected your location, the altitude will be calculated with much greater accuracy ### 2.6 — 2023-02-28 • Added new 2023 models • Added new feature: get weather (temperature, pressure, humidity) via Bluetooth using weather stations: Kestrel DROP, Kestrel 5x00, WeatherFlow WEATHERmeter, Skywatch BL • Added new feature: added the ability to calibrate the barometer built into your phone or tablet (go to the “Settings“ tab, then “Measurement units“) • Added new feature: added various utilities (unit converters) (go to the “Settings“ tab, then “Utils“) • We have improved our weather calculator significantly. Now you can manually select which type of atmospheric pressure you are working with (for example if you use portable barometers, weather stations): - sea level pressure QNH - sea level pressure QFF - station pressure (barometric pressure) • At customers request, we have added a new carburetion option, from 2019 you can choose which needle you will use for YZ85 model (stock (NAPG) or old (NBKF)) • Some carburation recommendations have been revised for better performance. Therefore, we strongly recommend that you check the fine tuning sliders, you may need to change them • New models are added - PW50 (Y-ZINGER), PW80 (Y-ZINGER), YZ125X, YZ250X • On the results tab, click on the drop-down menu 'Weather (AirLab)', new data for tuners are available: Air Density, Relative Air Density, Density Altitude, Station Pressure, SAE - Dyno Correction Factor, SAE - Relative Horsepower, Volumetric Content Of Oxygen, Oxygen Pressure • Added a new value for each carburetor configuration on the 'Results' tab: Throttle valve size • Improved functionality for the feature 'Weather for custom location'. We added a search bar where you can enter the location name. Search places easier and faster now • We added new fuels, this is gasoline with ethanol. It require a richer carburation than regular premium gasoline • Improved functionality and accuracy of fuel calculator • Bug fixes for 'share setup with friends' feature • Fixes for showing 'Carburetor icing alert', now it doesn't overlap other content • We reworked the altitude determination algorithm for the 'weather for custom location' feature. We hope that now, if you manually selected your location, the altitude will be calculated with much greater accuracy ### 2.5 — 2021-11-11 • Added new 2022 models • Added new feature: get weather (temperature, pressure, humidity) via Bluetooth using weather stations: Kestrel DROP, Kestrel 5x00, WeatherFlow WEATHERmeter, Skywatch BL • Added new feature: added the ability to calibrate the barometer built into your phone or tablet (go to the “Settings“ tab, then “Measurement units“) • Added new feature: added various utilities (unit converters) (go to the “Settings“ tab, then “Utils“) • We have improved our weather calculator significantly. Now you can manually select which type of atmospheric pressure you are working with (for example if you use portable barometers, weather stations): - sea level pressure QNH - sea level pressure QFF - station pressure (barometric pressure) • At customers request, we have added a new carburetion option, from 2019 you can choose which needle you will use for YZ85 model (stock (NAPG) or old (NBKF)) • Some carburation recommendations have been revised for better performance. Therefore, we strongly recommend that you check the fine tuning sliders, you may need to change them • New models are added - PW50 (Y-ZINGER), PW80 (Y-ZINGER), YZ125X, YZ250X • On the results tab, click on the drop-down menu 'Weather (AirLab)', new data for tuners are available: Air Density, Relative Air Density, Density Altitude, Station Pressure, SAE - Dyno Correction Factor, SAE - Relative Horsepower, Volumetric Content Of Oxygen, Oxygen Pressure • Added a new value for each carburetor configuration on the 'Results' tab: Throttle valve size • Improved functionality for the feature 'Weather for custom location'. We added a search bar where you can enter the location name. Search places easier and faster now • We added new fuels, this is gasoline with ethanol. It require a richer carburation than regular premium gasoline • Improved functionality and accuracy of fuel calculator • Bug fixes for 'share setup with friends' feature • Fixes for showing 'Carburetor icing alert', now it doesn't overlap other content • We reworked the altitude determination algorithm for the 'weather for custom location' feature. We hope that now, if you manually selected your location, the altitude will be calculated with much greater accuracy ### 2.4 — 2021-11-02 • Added new feature: get weather (temperature, pressure, humidity) via Bluetooth using weather stations: Kestrel DROP, Kestrel 5x00, WeatherFlow WEATHERmeter, Skywatch BL • Added new feature: added the ability to calibrate the barometer built into your phone or tablet (go to the “Settings“ tab, then “Measurement units“) • Added new feature: added various utilities (unit converters) (go to the “Settings“ tab, then “Utils“) • We have improved our weather calculator significantly. Now you can manually select which type of atmospheric pressure you are working with (for example if you use portable barometers, weather stations): - sea level pressure QNH - sea level pressure QFF - station pressure (barometric pressure) • At customers request, we have added a new carburetion option, from 2019 you can choose which needle you will use for YZ85 model (stock (NAPG) or old (NBKF)) • Some carburation recommendations have been revised for better performance. Therefore, we strongly recommend that you check the fine tuning sliders, you may need to change them • New models are added - PW50 (Y-ZINGER), PW80 (Y-ZINGER), YZ125X, YZ250X • On the results tab, click on the drop-down menu 'Weather (AirLab)', new data for tuners are available: Air Density, Relative Air Density, Density Altitude, Station Pressure, SAE - Dyno Correction Factor, SAE - Relative Horsepower, Volumetric Content Of Oxygen, Oxygen Pressure • Added a new value for each carburetor configuration on the 'Results' tab: Throttle valve size • Improved functionality for the feature 'Weather for custom location'. We added a search bar where you can enter the location name. Search places easier and faster now • We added new fuels, this is gasoline with ethanol. It require a richer carburation than regular premium gasoline • Improved functionality and accuracy of fuel calculator • Bug fixes for 'share setup with friends' feature • Fixes for showing 'Carburetor icing alert', now it doesn't overlap other content • We reworked the altitude determination algorithm for the 'weather for custom location' feature. We hope that now, if you manually selected your location, the altitude will be calculated with much greater accuracy ### 2.3 — 2021-10-30 • Added new feature: get weather (temperature, pressure, humidity) via Bluetooth using weather stations: Kestrel DROP, Kestrel 5x00, WeatherFlow WEATHERmeter, Skywatch BL • Added new feature: added the ability to calibrate the barometer built into your phone or tablet (go to the “Settings“ tab, then “Measurement units“) • Added new feature: added various utilities (unit converters) (go to the “Settings“ tab, then “Utils“) • We have improved our weather calculator significantly. Now you can manually select which type of atmospheric pressure you are working with (for example if you use portable barometers, weather stations): - sea level pressure QNH - sea level pressure QFF - station pressure (barometric pressure) • At customers request, we have added a new carburetion option, from 2019 you can choose which needle you will use for YZ85 model (stock (NAPG) or old (NBKF)) • Some carburation recommendations have been revised for better performance. Therefore, we strongly recommend that you check the fine tuning sliders, you may need to change them • New models are added - PW50 (Y-ZINGER), PW80 (Y-ZINGER), YZ125X, YZ250X • On the results tab, click on the drop-down menu 'Weather (AirLab)', new data for tuners are available: Air Density, Relative Air Density, Density Altitude, Station Pressure, SAE - Dyno Correction Factor, SAE - Relative Horsepower, Volumetric Content Of Oxygen, Oxygen Pressure • Added a new value for each carburetor configuration on the 'Results' tab: Throttle valve size • Improved functionality for the feature 'Weather for custom location'. We added a search bar where you can enter the location name. Search places easier and faster now • We added new fuels, this is gasoline with ethanol. It require a richer carburation than regular premium gasoline • Improved functionality and accuracy of fuel calculator • Bug fixes for 'share setup with friends' feature • Fixes for showing 'Carburetor icing alert', now it doesn't overlap other content • We reworked the altitude determination algorithm for the 'weather for custom location' feature. 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User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-09.*