Thanks I read I could use a police tach that had 3 wires on my bike but not the seven wire unit. I found that hard to believe but not I am re thinking that lol I really like the looks of the police tach . I can see it and its well made. The leads on the tach I have other inputs but I believe they or only for the indication lamps in the tach. The basic function that I supposed were tach and needed a ground, switched positive , and a trigger, like the tach The number 3 wire out of the ecu pink wire . same on I think that goes to the speedo. How ever on the tach I have has a serial data lead, abs, acc, ground, batt, Ign, pursuit. I am beginning to wonder what triggers this tach serial data? If I don't find out I will go the rout you did thanks Jim