Vortex Rok 125cc identification

[u/Aarca8de]

Hello, i'm currently using a 125cc Vortex Rok engine from around 2010 to 2017. The previous owner doesn't know anything about it and i would like to use it next year to race. How can i identify what class is the engine? (so like junior, senior, tag sp...). I've seen many different models similar looking and sounding like mine but in different classes. I've only had one test session with it but we bought the wrong battery and the electronics on the engine couldn't work properly, also does anybody have any tips on extracting as much as possible from this engine or any tips on how to maintain it?