Sportster Tach

[bigbreather]

Trying to install a CC mini tach on my 2005 Sport--- doesn't want to work---- needle jumps all over the place above 2000 rpm. Any ideas?

[gunnysgt]

Could it be you installed a tach for a single fire ignition and running it on a dual fire?? Many aftermarket tachs need a converter to run on dual fire systems.. Just a thought.