Sorry, sorry, and sorry.

I know there are plenty of posts about pre-mix and jetting but after browsing alot of them, I'm still not too sure about what I should start with. I'm mostly stock so hopefully this should be easy:

Stock pipes and chambers
Stock airbox & filter (with 4 big holes drilled)
Powerjets are retained
lost the injectors so full pre-mix
Did both wire splices
Located pretty close to sea-level (Virginia, US) but pretty humid.
It's a track-day bike but on a tight course so midrange will be welcome.
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The carbs right now have 42 SJs and 142 MJs and stock needles (no washers).

The bike boggs on the low end, especially riding from a dead stop, but the top is great!

Should I go down to a 40 SJ and maybe go up to 145 MJ, and maybe even add a washer to the needles?

Thanks in advance and again, sorry for the millionth pre-mix jetting question but I couldn't find a topic that matched my scenario close enough...

Jae (PekingDuc)