1983 GS750e carb main jet and O-rings

[maxredline]

I have a very sweet 83 GS750e. The only mod is a period correct Vance and Hines 4 into 1 pipe. I didn't realize how loud the pipe was but I totally rebuilt is with ceramic packing and paint. The engine ran fine but I figure it is running a little lean. Near the end of the summer the carbs engine was sputtering on throttle until hot then started surging. I now have the carbs apart and am chemical cleaning. I am still trying to figure out the main jet sizing. Stock is 117 so I figure going up 2 if that is possible but 120 should do. From what I have read the jet type is a small round style. I do not know if this is true or not so I am stalled on this point. I am also stalled on mixture screw O-rings.
I have read to install a 2mm washer on the main needle to richen that circuit up so I plan on doing that if I can not find a larger main jet.
Any information that can clear this up for me would be greatly appreciated.

[Nessism]

Read this... https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

Towards the back, there is information on how to lift the needle. Hint: putting small washers under the needle clip won't lift the needle.

Regarding pods, you will save a bunch of time and trial and error if you buy either a Dynojet kit, or some of member Zed's "air correction" jets. Oh, and make sure your pods are not the cheap junk Emgo/chinesium cheepies. Get proper K&N's, UNI filters, or similar.

Lastly, the main jets should be the N100.604 size