Did you have the carbs professionally cleaned? May have piece of filter lodged in one of them.
Is the vacuum line hooked back up to the Pair valve? (pic 3)
Don't know how likely a bad coil would be, but you can easily test it by switching the coils around to see if the problem moves to the other side.
2006 Ninja500R Purchased new July 2006; 0 miles. Miles as of January 2020; 108,827 . It's a GO bike, not a SHOW bike.
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