Assuming it was OK before, with the jets you now have, I’m going to guess something else is wrong.
The first thing I would do is check the compression. Then I would do a leak down test. After that, I would go through the clutch.
Now there is the possibility that you have had a big change in air density, so that could throw the mixture off.
Of course I’m just guessing. You didn't say what jets you now have, and knowing that might help.