Hi, I have problem with the new digital speedometer from Sip. First a little about the Vespa I work with:
Vespa GS 160 (1965 I think)
Membrane and Mikuni 35 mm carburetor
Vespa Tronic ignition system with 1kg flywheel
I connected the speedometer as follows:
Power directly from the power regulator, connected to the red and brown wire (no battery).
Black wire to ground
The problem is that the speedometer starts up and reset, but as soon as I speed up around 2200 rpm, the speedometer cuts out. It seems as if I must have a rev between 1600 rpm and 2200 rpm for it to work. When it is below or above, the speedometer blacks out.
Video of problem: http://youtu.be/90fKWAhqIBI
Someone got a solution??