I’ve not found a tool that supports the EVO yet. If anyone is aware of such an application, I’d like to know.
There’s an app for Android and iPhone that seems to work pretty well. It’s called “Jetting for Rotax Max Evo” and is published by ISEnet. It costs about $7 if I remember correctly. A word to the wise, install the plug it recommends. If not there’s a very good chance you will leave RPM on the table.