yea, im going to get them redone.
Thats what i was saying about the port. Its been opened up heaps by some sort of milling machine. Its alot bigger than the intake manifold... I might take the head off my bike and see if its port is a bit smaller.
The area im talking about is the red area. I marked the port with a red texta and then ground it on the same angle as the inside of the seat. You can see the corner isnt smooth, the valve seat is smaller than the corner of the port and so there is sort of a lip there.
ive changed ur diagram a bit, the lip im talking about is this,
http://www.mypicpal.com/jarvie/My%20...s/untitled.JPG
I think ill take a bit more off the sides of the lump infront of the guide and also a little more on the very top of it, thats if i continue with this head. Yea its a ducar.
edit for link to pic.