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FWIW , the TPS on my 1995 Cali 1100 I was always " on the money" when I checked it and was working perfectly without any adjustments up to the time the bike was traded in at 60k + miles. Perhaps a bit more info is needed before it is relegated to the trash bin, given how expensive and hard to find it is.
No Air bypass horizontally on TB's? I don't recall exactly where mine were, possibly horizontal when viewing from front to rear.