Sorry mate your right, the best thing to do was just not tell em at all. the strangest reasons would have to be given for checking the bore size if you had a write off and they were none the wiser, cause they'd be spending more just to check, mmm wonder if he raised the compression and had a big bore lets check that just in case, Yeah right ! But now youv'e said they'll probably be hiding down at JHP and tecmoto just waiting for you to turn up and mutter the words 853. And yes it will stay on you file.
*******s