Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
I use the tach more than I thought I would as well. I didn't have to mess with the speedometer at all. I even tested it zipping by one of those speed displays that the cops set up. It was right on. You're probably right on ECM throwing it off slightly.