OK. No-one has commented on whether or not it looks like there is any fuel modification, so I'll take that as there isn't.

So if the previous owner has simply installed a K&N filter and remove the snorkel:

a) Is there no performance or fuelling improvement at all and he was wasting his time?
b) Is the bike going to be running lean enough to do any damage, or will the system compensate sufficiently for such a small airflow mod?

Thanks!