Review on Enhance Your Motorcycle with Baron Custom Accessories Tachometer Adapter BA-7315-50 by Jay Williams

I installed this on my Honda Shadow Aero vt750c bike. There are two coils. One coil pack is located under the front left corner of the gas tank and the second coil pack is located under the seat behind all the electrics. I was able to route the cable with factory zip ties front and rear under the gas tank. I connected the yellow and blue wires from the adapter to the negative wires of the coil just a few inches before entering the ECM because they were easily accessible at that point. One at each end of the bike. But both were on the ECM. As everyone else said, it didn't work at first. I had to add a 47kΩ resistor from the green signal wire to ground and that fixed the problem. In general, the touch worked well. I had the biker's choice for $55. The arrow bounced in certain RPM ranges, but quickly settled down. Honestly, I don't think there's anything wrong with the bouncing touch. I just think it has too fast a response time. I added a new fuel map, cold air exhaust system, K&N air filter and high octane fuel to the bike and the power increased dramatically and the track stopped hopping. Every now and then you hear a little dip in the engine or some fuel and you can feel the needle bouncing around, but when the engine was running smoothly the needle was hard as a rock and it was hard as a rock the entire time from start to finish. from 1200 to 6300 rpm. The size of the resistance from the signal line to ground is not very critical, I don't think so. We are dealing with a 12 volt system only. To be honest I think anything above 12 ohms will probably work. When I only connected one coil pack it worked with no resistance, but when I installed a second one it didn't work. So it's on the verge of having too much or too little voltage, so it doesn't need much resistance at all. I don't think the tactic will work with any brand of tachometer. It's either a pull-up or a pull-up resistor. The Japanese sometimes use negative logic so they either lower the signal to ground or raise it to 12 volts. And so these huge resistors drop all the DC voltage across them, so just the signal is there. At least that's how I remember it from the college where I got my EET bachelor's degree. There is another guy who has a record similar to mine who used a 68kΩ resistor with no problems and his system worked fine.