Did you use the Beta speedo cable or the TT cable? I used the TT (because the connector plugs into the Voyager) and when I get over 65mph, my speedo flatlines at zero. TT said to try a stronger magnet, and American Beta said to try and move the cable sensor closer to the magnet... neither are easy. The TT magnet is too wide to fit in the Beta magnet's hole. This isn't a huge deal, but I don't like how my odometer isn't incrementing when I'm going fast. I'm not too concerned with how fast I'm going.