Jetting for Suzuki RM 2T bikes

It works out the jetting of 2-stroke Suzuki RM motocross bikes (7 models, 1994 to 2027) from the real temperature, humidity, pressure and altitude, the oil mix ratio and the fuel you use: main jet, needle and clip position, pilot jet and air screw turns.

WHY THIS APP
- 2-stroke RMs up to 2027, from the RM60 to the RM250.
- An Apple Watch app with complications, plus widgets, Lock Screen and Live Activity on the iPhone: the jetting of the moment without opening the app.
- It jets for YOUR fuel: 98 E5, E10, E15, ethanol-free, leaded or oxygenated race fuel, or your own values.
- Track mode: main jet, needle, clip, pilot jet and air screw huge and in high contrast, to read in full sun with your helmet on.
- It warns you when the weather changes enough to change the main jet, and when there is a risk of carburettor icing.
- Share the jetting with your mechanic with a link or a QR code, and keep your logbook in sync through iCloud.
- No ads, no tracking and no account.

To get the weather values the app can use the location service and the data connection: it takes your position and altitude, queries the nearest weather station and brings back its readings. It also works with no GPS and no data, entering the weather by hand.

The app has 4 tabs:
- Results: main jet, needle type and clip position, pilot jet and air screw turns for your conditions and your bike, plus air density and density altitude. With fine tuning to match your particular engine. A warning appears under it when there is a risk of carburettor icing.
- Conditions: temperature, altitude, pressure and humidity. Type them in, or pull them from the nearest weather station with one tap, without leaving the screen.
- Engine: year, model, oil mix ratio and fuel. The year and model determine the carburettor. The screen tells you what your fuel does to the main jet; octane does not change the jetting, ethanol does.
- Logbook: saves each ride with the bike, the fuel, the weather and what the app recommended, so you can note afterwards what you actually fitted and how it went, rated separately for the low, mid and high circuits. Export it to CSV, move it to another phone and sync it through iCloud.

TRACK MODE
From Results, the sun button puts the jetting full screen, big, with the screen always on and at full brightness. It shows how much the air density has changed since what you have fitted, the conditions, how old the data is, your fuel and the icing warning. From there you start a track day and show your mechanic a QR code.

ALERTS
During a track day the app keeps an eye on the weather and tells you when it changes enough to change the main jet: "Air density has dropped 1.8 % since your last calculation: the main jet goes from 172 to 170." With the hourly forecast it can also tell you ahead of time. Forecast alerts always arrive; the others depend on iOS.

Units: ºC and ºF, metres and feet, mb, hPa, mmHg and inHg, and kg/m³, lb/ft³ and lb/gal (US).

Models and years:
- RM 60: 2003-2004
- RM