Thinkin I should fix this leak right at the bottom of the engine on my 92 K100RS

[tsbt]

Here's what I've discovered, not sure if this is an O-ring that's worn or if this is a normal amount of oil sticking around the inside of the clutch housing. Attached the pics. Is this enough oil to warrant an o-ring replacement?

Also wondering if that leaky breather hose I need to replace is leaking all the oil down the engine and under the belly of my bike rather than a leak inside because of an O-ring. Posted a pick in the next reply. Love to hear your thoughts. thanks!

[tsbt]

Those pics of that hose:

[Fifth Horseman]

There 'should' be no oil in the clutch housing, probably its either the o-ring or the engine output oil seal.  Its best to replace both if in any doubt. It could also be from the transmission input shaft seal, but from your pictures that doesn't look likely (transmission oil smells different too).
As I found, with the transmission out its a good time to replace that breather hose as access is easier - it attaches to an oil separator inside the air filter box. This leaking would not introduce oil to the clutch housing but it will mess up the engine fuelling due to air getting onto the induction system where it shouldn't.