I want to do this as well so I don't rev too high when cruising. This is my first bike (Rocker C) and I just don't know what rpm I'm at by sound alone.
i would love to somehow get rid of that speedo on top of the tank. It's absolutely hideous man. I think we are screwed cause i heard that the gas tank underneath the speedo looks like crap !!! i would be interested in a tach though.
I have the 4in combo tach/speedo on my Rocker and I love it. I hated not knowing what RPM I was spinning. Sorry no pics but they never come through anyway. The tach/speedo plugs right in and works great.