Hey Meck does your speedo look like mine? I wonder if mine has a backlight too. See the picture of it above. I will have to check mine out when I get home today.

I just installed and tested the Sigma 1106. Works great but no backlight either. Mounted mine next to my Digital Tach so I can see Speed and RPM at a glance without looking down.

Like others have said-major improvement!  

IRC shows the 190/90-19 M/C 57H at 670 mm, not 667. Maybe there is a different tire for the S40 versus the Savage?

http://www.irc-tire.com/mce/

Converting at 3.14159 for Pi yields 2105mm.  I originally plugged in 2115mm and found it did not match my odometer very well. Seemed OK at first but I found I was off by about 0.6miles after about 72 miles of driving.

I also made a small adjustment to my sensor placement and it stopped reading. Looks like the sensor has to be pretty well perpendicular to the magnet path.  Moved it about 10 degrees closer to perpendicular and it picked up reading again.

I bought the tiny Radio Shack rare earth magnets. Epoxied them to the rim, stacked edge to edge and then mounted the sensor under the fender mount bracket. Probably has about 3/16th clearance. Since my magnets are on the rim edge,  I'm about as far from the axle as possible and yet it reads very accurately now that I have dialed in the circumference.