Ok Im building a 110 from a pile of parts. Just got my gasker set and since I have no idea what gasket went where cause I didnt take it apart. I was wondering where the round copper ring is for, kinda looks like a small bull ring.

 

Put it in the exaust port on the head between the head and the exaust pipe. as you tighten the exaust pipe it will crush a little and seal right up!

 

ok cool thanks,for replying