I am looking into what has been done to my bike (its a 2010, and I got it about 2 months ago). Here is some information from the throttle body, I think its stock, but the number on the butterfly is 56mm, and I know the stock size is 46mm. Any thought that this throttle body was bored out, or that this is not the stack throttle body?

Part #27708-06 on tag, also #s 27618-06, G-3-A, and 7022 embossed on same machined surface. Number on throttle butterfly is 70836, 56mm wide.

Thank you