Amen o-guy- its simple if you don't complicate it- keeps the fudge factor at bay.
What Verslagen is tryin to tell you holds the key... It could be alot of things because you changed alot of things at once. Jumpin that many jet sizes is a BIG risk because you don't know which change caused the problem.. Small steps.... 1 size at a time. 1 Mod at a time, it'll take the guessing out of the equation. If you do it that way, you can always go back to what you had going on before you made the change.
Let us know if it gets better, sux when a perfectly good machine won't run
- maybe we can come up with a few more things that could cause your problem