What mods can I do?

So in short I have a Powerfist 212cc engine from princess auto and was wondering what type of mods I could do to it? More specifically what parts would fit in it? predator 212cc, 196cc, 224cc ,etc flywheel/rod/cam/ literally everything. I’ve heard that it uses a 212cc flywheel and a 196cc rod but I’m not to sure, so if anyone has the answer for me please let me know 🙏