2nd Gear Replacement Query

Hi rocket brains trust. I am in then process of replacing the 2nd gear and dog and other bits and pieces in the trans on a 2008 Rocket. I have received the replacement kit T1180188 and it appears that the dog is not correct, as the old one was an 8 tooth dog the new one is only 4 tooth. If anyone is able to advise me it would be much appreciated.