ok i just bought my first plane, and it has a supertigre 45 on it, but in smaller print on the engine it says 4.5cc, which in ci would be more like .28ci but all supertigre 45's i can find say they are .46ci, so now i dont know if i have a .46 or a .28ci
thanks in advance for any help

The 2 in 2.5 is probably a 7. 7.5cc is .45c.i.

oh wait i put 2.5 but it says 4.5cc sorry