Modern Buddy

I have been offered a 3 port set up really good price my engine is a2010 125cc model.
My question is would I be wasting my time fitting the 3 port against the 5port in addition to having an extra 25cc.

Is it 2t or 4t? If 2t, hold out for a P200 motor. Add and exhaust, rejet, and never look back.
Good Luck