[chinoy]

Does the head you guys get in the US come with the second plug hole blocked off.
Or is there no hole there.

The reason I ask is because

a. I hate the twin spark Idea.
It makes modeling the combustion process acuratelly very hard.
A 84mm piston really doesnt need two plugs.
The second Plug being a projected nose plug is doing more harm blocking / impeding flow both at the intake and exhaust valves.

Im thinking of
a. Welding the hole up
b. Installing a threaded ali plug.

From what I could tell of the one pic Ive seen it looks like the hole is pluged can somebody confirm ?

[JMHAZ]

There's a recess cast into the head for the second spark plug on mine, but no hole - it's solid metal. So there must be separate casting processes for the two heads.