How do I hook up my tach to the Dyna 2000? Matt May 22, 2018 23:54 Follow In dual fire installations, you may use the factory tach connection or you can use the tach output provided with the Dyna 2000-HD1E. For single fire applications, you must use the Dyna 2000 tach output green wire for correct single fire operation. Related articles Power Vision Recovery Info How to configure dyno for use. Will my stock pickup work in single fire mode with the Dyna 2000? How? Where do the blue and white wires connect on the DS6-1 dual fire Dyna S How come my motor seems to be harder to start or sometimes kick back? Comments 0 comments Please sign in to leave a comment.