Do I need to re-jet my Thermoquad?

I myself would richen it up just a smidge. I can’t recommend a exact rod and/or jet to use. I can suggest only trying a set of rods that are thinner. As such it would richen up the mixture. You are a little lean. Not really a bad thing. When it gets cool out, at night, winter, the air molecules condense leaning out the mixture even more. Post up what rods and jets you have in there now.

If it were myself, a O2 sensor would be an excellent additional tool to help tune it up. Id try a rod that is .002 thinner. Or a jet size .002 bigger. And see where I’m at.

Now there a bit pricey to get. So let me know what you have. I MAY have a double set of something here that could be worth the try.