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First the Dual Ducati ignition is very difficult to defeat. Make absolutely certain you have no spark. At less than 250 rpm the Ducati system produced no spark at all (not a weak spark, no spark). Be sure to pull your cord with a brisk full 6 to 8 foot stroke of the rope. Could be you’re just completely flooded and running no load for a few minutes will clear the lower end and “warm-up” a cold blooded engine. Try all these tests before concluding you have no spark. You can’t believe the number of operators we hear from that chase problems on a perfectly good system. Unlike the old Bosch points systems, Ducati systems do not have a blazing spark at low rpm’s. The Stator at the left is the old style identified with white “taped” ignition polls. The Stator on the right is the new style with a black molded protection on the same 4 ignition poles. Each has a different ohms value when testing. Old Style and new Style Pick-up Triggers: On the first release of the Ducati Ignition the triggers had an “unadjustable” round holes in the mounting ears. The newer units had slotted ears as shown in photo. Shows the test for a new style stator output leads across the white and green leads. The chart shows an expected value of 280 to 330 ohms. Meter shows 294 ohms. The part checks good. Chart for Ohms Resistance Values Stators, Triggers, Tach Leads, and Spark Plug Caps. Testing Electronic Boxes: The transducers or Black boxes are another expensive component we can run a full set of checks on to determine if we are working with a faulty part. The chart shown here gives you the ohms values when testing any of the colored leads as well as across the spark plug wires. Electronic Black Box Test, Installing new plug wires is a simple as threading the new wire onto the threaded post inside the plug cap or the E-box.
Tags : spark plug wires, black box test, plug caps, electronic boxes, resistance values, black boxes, plug cap, stator, spark plug, new style, old style, transducers, rpm, rope, bosch
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