I bought a honda gx160 head off ebay with casting numbers JT 31. I am trying to find out if this is a 14cc head or what exactly it is. I compared it to an older head that I have and I can't really tell a difference. If there is anyone who knows what this casting number is or anyone who can tell me what to look for that is different on a 14cc head, it would be greatly appreciated. I have never seen a 14cc head so I don't really know what I am looking at.