Honda VTX 1800 Bikes - Recommended to perform GROUND FIX - The VTX 1800 bikes continue to have problems with the overall OEM ground locations. The powder coated frame on the bikes does not allow for a proper grounding source. View a great tech article from Bareass Choppers here
Honda VTX 1800 Bikes - Recommended to remove Pair Valve Assembly - Check out this link for a great walk-through of removing the PAIR valve assembly and the secondary air system on a VTX 1800.
View how to article from Bareass Choppers here
The GREEN zone engages at 1250 rpm with a GREEN/BLUE setting of 4.5.