I just need a freeze plug, or similar, to plug the hole in the head. I have had the AIS removal kit from Yamaha on for a while now and it runs great. I was riding last week and the whole elbow piece that is press fit in the head blew out with the pretty aluminium plug on it. I want to get rid of that whole piece and perminantly plug it. Can someone point me in the right direction? What size I need? where to get it? Thanks.