Not sure how it is on the Vaquero, but when I put Euro gears in my VN2K I got to see how the gear position sensor is laid out in that one. Inside the inner transmission cover there is a sensor with several contact spots on it...one for each gear and neutral. Then, on the shift mechanism there is a spring loaded contact point that grounds the respective sensor contact when you're in that particular gear.
The VN2K only shows Neutral, not each gear, but I believe this sensor may also be used to determine timing advance and perhaps fueling curve.
Again, not sure if the Vaquero is same or different but one would think they'd use similar technology.
Last edited by whoaru99; 07-22-2013 at 12:33 PM.