the timing gear on the fox block i have has this weird circle piece of metal bolted to it, it almost looks like a large freeze plug. my timing cover wont fit on it with that so i took it off can anyone tell me what it was for? i hope its not important lol. the fox had the double roller style chain and my sn95 has that crazy link style lol anyway the sn95 didnt have it on its timing gear si didnt think itd matter...any input would be nice thank you!