I've only just bought this bike, so at the moment I'm still trying to figure out where the oil is leaking from. The previous owner didn't really know anything whatsoever about mechanical anything. When I went to check the oil after buying it, the dipstick was completely dry and the bike had maybe 1.5 quarts in the sump, so it's leaking from somewhere, but it was also at the very end of the oil change interval so it had plenty of miles to get rid of the oil.
There is plenty of oil all down the left side of the engine from the phase rev sensor all the way down to the oil pan, but no real leaks.
I did see smoke coming off of it yesterday night when I would pull to a stop in the dark and some stuff wafted up in front of the headlight.
I know it's also leaking from the right side valve cover gasket, and it's due for a valve service about 500 miles ago.
Oh and there is oil leaking from the right side throttle body, but I know that's due to the airbox deal not being drained.
Maybe it's time for a trip up to Moto International.