on the throttle bodies. I noticed some small voids in the t/b before I sent them off to be machined, but upon return WOW. The porosity of the t/b casting is terrible for a production part.
I am very familiar with castings and the casting process. I worked for a brake system supplier for 7+ years and if we ever had that kind of porosity in our rotors/calipers/wheel cylinders/etc. we would have been desourced! Granted most of our products were cast iron but a small amount were aluminum.
I also understand that the further away from the surface, the more prone the area is to voids forming. It may be expected a little by machining 1.5mm of material depth, but I am surprised.
I am sure its not a functional problem as the T/B's really don't see any stress, but its the point of it. I always had this image of Italian quality when it came to motorcycles.