Installed an AutoMeter 3 3/8" tach on the handlebars that worked perfectly for several mos. Originally connected hot/grd to guage harness and tach to factory wire on the left side of the frame. While driving it developed a flutter and the needle fell off. Mtn BH (great as always) sent me a new one but the flutter remained. The tech support at AutoMeter suggested a 50K pot in line. That didn't have any effect regardless of resistance. They then sent another tach as they said there was a design change and that they had some needle problems. Still flutters. Ran the ground to the frame. Ran tach wire direct to the dist., tried hot direct to the battery. It even flutters (around 0) with the motor not running as long as the ignition is on. It will stop only when the power source is interrupted to the dist. (h/bar on/off switch, fuse second from bottom on rt side removed, + or tach wire at the dist disconnected). I replaced the coil, module, condenser with harness with no luck. Any suggestions. I'll check my email when I return from anger mgmt class. Conrad