1992 Yamaha SECA 2 carb questions

OK I have a few questions concerning a 1992 Yamaha SECA 2 that I bought. I bought it in pieces and have been putting it back together. I recently rebuilt the carbs, but in the carb kit I got there are 2 sets of 4 O-Rings, Small O-Rings. I took the carbs apart but found no small O rings to replace. I think they are for the Pilot Screws and Needle jets but im not sure because when I took my pilot screws out they had no O rings, also when I took my needle jets out they had no O rings. The pilot screws were also tampered with. So does anyone know should my pilot screws and needle jets have O rings on them. Also my pilot screws were removed and im unsure about what the settings should be and the air pilot screws were turned all the way in. I think the previous owner may have taken the carbs off and reassembled them incorrectly. I put the carbs on as is and got the bike running but it wont idle. It runs in choke but wont rev past 4k revs. I have adjusted the pilot screws for the air and fuel but I still cant get it to run right. It has no exhaust or air cleaner on it also. So I need to figure out where the O rings should or shouldnt be and also how should I set my pilot screws and any other advice.

 

The carbs on the Seca two if I'm not mistaken are Mikuni but the mixture screws still will have a small O ring at the bottom and a small washer on top , you will need a strong light and should see it at the very bottom a sharp ice pick can usually fish it out...unless PO did not put it back in. Possible the large O rings you reference to are the butterfly seals . To replace these a full tear down is required, throttle plate removal required. Recommend replacing seals .

 

It seems like the PO did not put them back in. Dam the PO Thx

 

Whether Hitachi or Mikuni very similar in tear down see my post on Why you should replace butterfly seals. The proper way is a full rear down of the carbs all rubber seals removed , soak in carb cleaner ( I use Berrymans one gallon carb dip) soak for three to four hours ) the only thing that might be a problem I think thr butter fly screws are "staked" in ...I always replace the hardware on the whole carb ....ACE hardware for metric fasteners is my go to .