Rylee wrote on 04/18/15 at 22:43:32:Did some more searching and finally figured it out. Tapped the light wires into the vacant horn power. Fed the coil wires up thru the tunnel and got the connected. Grounded everything on an unused factory bolt location left over from the bobber conversion. Everything is all buttoned up and wires heat shrunk and tucked away.
May not seem very useful where they are mounted but I wanted a clean triple tree and nothing above the bars. Surprisingly they are both in my extended field of view. To be honest I rarely even look at the speedo unless I see the fuzz and feel I'm going to fast. The tach was more for idle speed and to get an idea of what RPMs I'm at while cruising in specific gears. All I all I'm super happy.
25 bucks for both off eBay. Got them in 2 days and on e I figured out which wire was which took about 30 minutes to install. Took a test run to heat it up and see where my idle speed was and I was sitting at about 1400 RPMs which didn't feel bad without knowledge of the exact rpm. Now I know where it's sitting. Ran the gears out to up to 4500 to see what that felt like and realized when I thought I was pushing each gear I actually had quite a bit to go.
Ok, I have a similar Tach that I bought off ebay. I'm not super mechanical but I have pulled of the tank and everything. Problem is that I still don't understand how to wire the 5 wire tach.
I have a test light that I clamped to a neg on the bike and when I touch either of the posts on the coil it stays on which I thought would be off and then should flash when I push the starter.
I guess I need the dummies guide version of what to hook the wires to because I hear a lot about hooking up to the neg or pos side of the coil but I'm either not doing it correctly or not understanding.