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I'm back.. Saturdays got eaten up.  I got brave and removed and dissembled the carb. Its fairly simple as it applies to moving parts etc.  I did make a mistake.  I went and purchased parts cleaner in an aerosol can instead of Carb cleaner which seemed to be more for cleaning it in place? The cleaner did a good job and I will say that guy I paid to clean the carb obviously did not disassemble it. The jet that has the multiple sets of tiny holes offset from one another in the main jet area was clogged.  Took some fine wire and pulled out some green crud. Blew parts cleaner through it from both sides so its clean.  My problem was the parts cleaner.  The throttle stop screw that has an O-ring … the parts cleaner swelled it and when I was reassembling I pinched it and as I was trying to recover from that in backing it out.
The parts cleaner by this time was eating the plastic handle on my screwdriver so … huge flub on my part.

SO... no idea where to get that O-ring save for finding a store that sells or has a broad selection of sizes, Maybe the scooter store has them?  Or..... being as it seems to be a bottomed out insertion I am confident I could Teflon tape that groove for the o-ring to be air tight

So aside from that, I think I'll be in a better place with a clean carb.  Thoughts on O-Ring? 

OK... totally confident in what is required.  Found a decent How To for the same carb and its pretty straightforward.  not too complex at all.   Sound is bad with the wind, but I get it. I can total get that accomplished.
  I suspect it will be clean as I have faith the guy who did clean it, did a good job.  Wish I would have come here first but the goal was to get this off MyPlate.  Now its not a rush. just get it done...and done right. 

Thank you dan V. for hanging with me. Today and on a few prior start ups, I (think) I experienced the auto choke cycle. It starts right away and if I just leave it sit, it slowly ramps up and then backs down automagically... once it falls off I can take the throttle and slowly go to full open and in about a minute or two it will finally get to a full throttle run.  not that I know what that is specifically, but its really humming along.  Today I did that and obviously it smokes like crazy ramping up but clears out to something reasonable after running a bit.  It will run fairly smoothly at this level for as long as I hold it open.  I did it yesterday for a good 20+ min and the muffler was so hot it was smoking the tire when I stopped!!! I had to put a piece of sheet metal there until it cooled down. Probably not good.   
The down side is... If I shut it off It will not come back up to full throttle. It runs rough and gets about 3/4 of what it was.  IF I pulled the plug it would be wet with oil.  frustrated I walked away.

I'll check the area you mentioned but did not see that defined in the link
a plunger extend into the carb closing off the enrichment circuit as the device warms up. picture/page
If the device is faulty, or if the leads are disconnected the carb will run rich.   You need to check it's operation.  Faulty due to sitting or such is a possibility.

I wanted to ride it when it was really humming along but once its shut down... no returning to full throttle.  And that's under no load.
 J.M.   

Thank you for your input.  I feel like I might be able to resolve this some help.
Correct plug via manual is NGKBR8HSA  I dropped one hotter in there a 7 obviously got me no where.
The guy I took it to initially cleaned the carb and being as it would not start initially I'll go with he did it.  It would fire with a shot of starting fluid but not stay running.
The breather mod he put in there was in his opinion required. I provided a new air filter for it, but he said it would not draw through it. Being as he has it siliconed in there I'll leave it as one less Varriale to mess with for now. Forgive me if I think a young person might think its  a cool thing. 
No critters in this thing. there was not so much as a spider web on it just 18 years of dust dirt. It was covered in a clean dry area.  All I did was takes some pats off and wash it well

It does not smoke at all once its warmed up and running.
The fuel / air mixture, and resolving how much oil is mixed in is the key as you indicate. It ran "fair" for about 4-5 miles of almost continuous wide open throttle, but it started falling off. as it got around town stop and go. Sketchy in the mid range but not too bad once full throttle full speed was reached. but I would not buy it if I was in the market for one running like that...
I can't really afford more money or I'll have little to give back to the widow lady. I thought maybe $800 if it was running well. I've got $350 in it already.   
I'll search for a service manual.  Again thanks for the words of assistance…
I'll take any input from guys like you who probably have a ton of knowledge to offer








reality is I can't afford to throw more money atit as I need to get it sold for as much as I can for the widow owner. maybe a tad more butthose two guys would take me to close to whatit mightsell for and I am notconfidentof what that is... is $800 unreasonable for an as new scooter with 150 miles on it... OK its 18 years old... New Tires though! 

Not exactly a barn find but an elderly couple bought a Yup 50 in 2002.  He died shortly after that. Long story short she needs money and I offered to get it sold. It looks brand new being inside and covered. It only had 130 miles on it. I drained and washed the fuel tank, I put a new fuel filter, and battery in it. Could not get it to run. Took it to a guy who got it running albeit a bit rough. He cleaned the carb and that was about it. He did do some sort of Breather mod in a can shaped filter attached to the air box... I can start it but its starting to run worse. The plug is now black and when I pull the plug I can see black fluid and I suspect its getting waaay to much oil. I got it to run with the air screw out1-1/4 turns but it eventually falls off to were it wont even get to top end.

I'm not a mechanic but I'm handy. I do not know a lot about 2 strokes, I shot to soon and put new tires on it when he said it ran so I have $350 in this thing and was hoping to get $800.  now I can only see selling it for some stupid low price for an 18 year old As New scooter. She need what little money I can profit and I need help.
 
Can I adjust the amount of oil being injected.  Sadly I do not even know where the oil pump or meter is? I had a ngk 8 plug and stepped it up to a hotter 7 but that did not help.  I really don't want to go the way of pre mix I think that would be a deterrent… maybe I'm looking at that from my age of 64 not 20 something.   I need some help Please J.M.