[slonomo]

That's a good tip using the tubing/sleeve. I too have the same tach, had the same problem. I just used some small pieces of a business card just where the sensor body grabs the wire, and it works great, although I get some kind of coil signal interference above 5000 rpm. I bought a new coil with plug wire and it solved the "grip" issue, but not the 5000 rpm issue. It's a nice tach though.