Thanks for the info! I was figuring on that with the tach, just wanted another opinion. Had no idea that ground contact was the standard, though, and that's very helpful, as well. Tried the link, and that looks like what came with the unit. Mine is the Acewell knock-off. Little round guy with two buttons. The instructions show how to set the speedometer for tire diameter, but nothing about the tach. I know on a car, it matters how many cylinders you have, but I suppose with individual coils it should work. Oh, and I'm running newtronic ignition. Now that I think about it, there may be a tach output.... Thanks again!