Digger:

I did get a very basic tech data sheet, and a dimensioned drawing, but no real installation instructions. I have it working now and it is great. Here's what I did.

Fortunately, the wiring is really simple. I placed the LCD unit on the left side handlebars at the mirror mount. Just run the positive lead down along the existing wiring harness to the spark plug wire, give it about 3-5 tight wraps around the outside of the plug wire, and then wrap electrical tape around the wraps to hold it tight. Take the other wire and run it to the battery negative or some convenient ground point.

Sounds easy,but it's the access that is a pain. I first tried to see if I could get a couple good wraps on the plug wire by reaching under the gas tank with my skinny fingers. Then I pulled the plug wire out and of course I was able to wrap it nicely, but then I could not get the darn plug wire re-seated on the spark plug.  So I took off the seat, gas tank..you know the drill.

Anyway, this allowed me to do a better job of running the wires.  Soon as I had it all back together it fired right up and worked like a charm.  I have it taped in place as I have not decided how I will permanently attach it to the handlebars.  

Incidentally, I went for a one hour ride in an area you probably know very well. Headed up to Titusville, thru the KSC complex area, past the Astronaut Hall of fame, the VAB,  back thru Merritt Island, then US1 back to Melbourne.  

Good luck with the install. Worth every penny of the $25 to have accurate RPMs and an hour meter.  

Digger wrote on 08/17/08 at 20:14:18:


Digger:

Your best access for a temporary rig would be from under the front of the gas tank. There is enough play in the wire to get a few wraps of the positive around it, and then you could just twist the leading and tailing ends to hold it on for a few minutes while you take readings. Try it before you pull off the seat & tank. I wanted a permanent solution and I needed tight wraps and lots of electrical tape  so I had to go the more complex route.

Tach is velcro'd to a T shaped piece of aluminum which is boltes under the mirror cinch nut. The Sigma is also velcro'd on top of the suzuki emblem on the top trippleclamp. I feel the velcro mounting reduces vibration dammage to the units. Ground on the tach is one of my windscreen bolts. Pick up for the Sigma is popriveted on a L shaped piece of aluminum (See Pict). Magnets are from Radioshack (earthmagnets, (2) on top of each other) and are NOT glued. Visible just under the mount.