I would not mess with bean oil for this application.
Remove the intake valve oil seal, no special tools required.
This will allow some oil to slip past ( but it's not a proper replacement for an air oiler and I am not sure you really need one ).
If I had to rig something up to drip oil I would look at something like Aeroshell 100 or higher heated so it flows.
That particular brand of Aviation oil is a favourite of mine because it burns very clean, has excellent corrosion protection qualities and sticks to engine innards better than most.
You really need very very little oil.
Another consideration here is the Honda design itself was created with emissions in mind.
It has a really excellent oil control ring.
Too good actually, these engines are poor top end oilers that need some help in some racing applications.
Reducing the tension on the oil control ring and scraper ring ( by heating so its less effective ) will leave more oil on the cylinder without reducing compression
The clone carb body is ordinary recycle beer canium.
Drill out the venturi and fill all the holes with Epoxy ( JB weld is fine )
Blend the air horn into the adapter for your gas mixer.
These clones need decent oil in the crankcase.
Improvised home pressed veg oil will not work in the long run.
I suggest for this application something like shell Rotella T or like mixed fleet type oil.
You want the high detergent package from a diesel rated oil to deal with the soot and keep it in suspension.
You should change oil every 20 hours, but I think if you gravity filtered through something like a toilet paper roll you could easily recycle a decent oil several times before the additive package was depleted.
I am new here so before I get too deep into this I build a lot of these clones.
There is a lot of room to improve a clone to take advantage of cheap and easy to get "speed parts"( often free to a dumpster diver ).
If there is any interest in this I can probably post some information and take some pictures, but I do not want to hijack a thread on my first post.