I installed my tach and have a Ducati ignition,
the instructions come with the tach are spot on.
there is 3 wires, positive, negitive and a green wire which goes to the positive side of your Ducati ignition coil, which I think was the green wire in Ducati ignition harness, which has 3 wires, lol.
the 2 big nuts on top of your fork are threaded inside except for the top, just drill out the cap and put a bolt in it to mount your tack on.
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"Its Was A Full Time Job, Being A 2000 Ural Patrol Owner" 650 cc, Pekar K-68 Carbs, Ducati Ignition, Extra Capacity Oil Pan, 40 AMP- 2 Circuit Fuse Box With Relay In Side Car, New Tach, New Cruise Control/Throttle Lock, New Nippon Denso Alternator, Trailer Hitch, New 2-Driving Lights, Harley Police Seat, New Custom Made Nylon Cover, 5 New Sachs Shocks, New Duro Tires.