Found this scratch on my lapped front iron today, I dont know how it happened. Its located on the exhaust portion of the cycle, the oil seals and the side seal will cross over it during operation. Useable or not?

 

I don't think that's enough to worry about, who did the lapping? You may want to check with them to see if it's acceptable.

 

Actually after further examination and looking at photos of the irons before I took them in, I think that damage was there previous to lapping and they only took off what was necessary to preserve my irons as they're reaching their limit. I already texted mazdatrix and they gave me a thumbs up.