My wife's Sportster is like that...
Now if that
Bogie, do you ride too?
Sorry for the OT post. To make up for it I'll throw in a link:
is a site to give you the basics of plug reading.
I have a link to an article on plug chops that I cannot locate just now, but a search will provide plenty of info on the how-to part of it.
That is a good point about plugs- often they will not recover from fouling, despite being cleaned. They may be good enough to get some idea if used for reading after being cleaned, but it's better to bite the bullet and use a new set.
Back when plugs were fiddy cents apiece there was no reason not to replace them all after a run. Nowadays, they're still cheap- at least the regular type plugs are, but there are some plugs (like platinum/iridium) that you just cannot toss that easily. Even replacing a few plugs w/new ones and reading just them will suffice once you know what cylinders you are concerned with, or which cylinders are running rich or lean due to intake distribution, etc.
After reading them they can be used for normal use once things are dialed in.