I can't speak for the Vapor, but I can for the Acewell computer I installed. The stock speed sensor has 3 wires, where the Acewell computer has 2 wires.Why not just use it to drive the Vapor instead of adding the Vapor one?
just recalibrate in the set-up on the wheel size for the multiple pulse counts.
You already have the wiring right there to the connector plug anyway .........
It may be possible to use the 3wires. The SV wiring diagram shows: pink, orange, and ground. New computer just shows: speed+ and speed-. Maybe no need for ground? Or, maybe will not work w/o ground? Anyone every played with this?