Ducati ignition, Rotax Ducati ignition, Rotax Ducati ignition wiring diagram

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Rotax Ducati ignition wiring diagram

The grey wire is your tachometer lead - it goes to one side of the tach the other side goes to ground.

The heavy yellow wire and the heavy yellow with black strip are you 170 watt light coil, these connect to your regulator rectifier - which then charges your battery. They can also be hooked up to SOME strobe lights - CHECK before connecting to make sure your strobe will work connect directly to the system!!!

The two remaining yellow wires are you ignition kill switch one for each magneto. Connect them to one side of a switch and run the other side to a ground. 

I have a Rotax 582 with an after market electric starter.  It seems that about  every two weeks my battery is low or dead.  So I hook it up to a charger  overnight and it seems to take and hold a charge.  I suspect that the battery  is not receiving a charge from the engine.  I hooked a voltmeter up to the  battery leads tonight.  The battery had about 12.7 volts.  Then I started the  engine and measured the voltage across the leads with the engine running at  about 3000 rpm.  It measured 12.6 volts.  Is this adequate?  I think it should
 read more like 14+ volts.  Any ideas?
Disconnect the leads from the lighting coil to the rect/reg check the AC voltage with the engine at 5500 or so RPM voltage should be above 30 volts then reattach those leads and disconnect the leads from the rect/reg to the charger read the DC voltage with engine at 5500 RPM voltage should be around the 14 or so you anticipated.

You do have a problem, just where is the question with all wires attached, you can read the similar points, engine running, and see much lower numbers at the lighting coil outputs. the 'open circuit' voltage from the lighting coil will be very high, perhaps even 50 V AC, but connecting it to the rect/reg drops it quickly to 15
or so the DC output is the same as the voltages you measured at the battery with the engine off, battery voltage should be 13 or so and this will depend to a great degree on when it was charged and how much, the small systems we use will not match a good commercial charger for charging a battery, they will run them up to 15 or so, but this high reading will be quickly reduced by either hitting the starter briefly or turning on a device of some sort.

I suspect all the various parts but the usual problem is the regulator rectifier.
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Ducati ignition wiring diagram

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