Just some trivia. Imo, it is better to start with a super rich main on a bike that is new to you irregardless of how it runs. The reason is that it might have been jetted too lean by the previous owner and/or it might have been jetted properly but for warmer conditions and/or higher elevations and if you live near sea level and/or where it is much colder than where it might have come from etc.,it will be lean and might be lean enough to cause it to seize. This is the same if you have a new engine but performed high perf mods too it during the rebuild.
PLUG CHOP - You do NOT want to do this on any bike that you are unfamiliar with. The reason for this is, if it happens too be too lean, it might seize during the wot plug chop run. If this occurs, it would be unnecessary to do a plug reading.
This actually happened to someone on the site around 6 months ago. I asked him why he did that and he said a mechanic told him to.
It must have been a HONDA mechanic! Ahhhh, ha ha...