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Leaky dipstick.
+1 or seeping rear main. You have easy access on a spine frame to the magnet, Tonti is a no go unless you have frame apart.
:popSimilar leak as my EV. I've suspected the dipstick but can't find anything wrong with it. In my experience it's an intermittent problem that seems to happen at sustained high speeds in warm weather....which is no surprise if your oil leak is intermittent. It's an annoyance since I like a clean ride but not a problem (knock wood).
Hate to say it, but its probably a transmission or a engine crank seal leaking fluid inside the bell housing. Look at the slot on the belly of the clutch housing and smear the oil on your finger. If it has a potent smell, it's trans fluid. If not, engine oil. My '98 EV has been doing that for years. Seems to be fairly typical of those year models. Not enough to worry about.
Won't make a comment on the source of the drip, sounds like you have plenty of input on that, But it is good to know what a Lannis looks like ;)
Leaky dipstick to me means over pressurized crankcase. Which to me means that the breather valve may be malfunctioning.