Need help on a topic beat to death TTR125 jetting

I'm taking him the bike and my associated blood, sweat, and tears

 

Did your mechanic get this sorted for you?

 

Haven’t had time to get it over there, unfortunately.

 

Lol, was looking for tips to jet a TTR125 and this thread was on the first page so remembered I never came back to it.

Anyhow, got my bike sorted out (for the most part), but there's a slight bog on acceleration and there's stumbling/pulsating at WFO. I *think* I have a 120 main and a 20 pilot (or something similar) in there, but not 100% sure. I think the stumbling is almost certainly a rich condition caused by the oversized jets, so I'm thinking I'll do the airbox mod (I already took the snorkel out, but now will drill out the airbox).

So yeah, I'm 95% of the way to getting this sorted (got it there a few months ago and have been too busy to mess with it).