Thanks!
This is for 748,998
It's important to note here that, given the obvious need to charge the battery, the stator wires will have to pass 29 amps (350 watts/12 volts) continuously. So I advise you to keep your bike on a trickle-charger whenever possible to reduce the demands on your charging system. Also, avoid the temptation to replace your battery with a low-weight, lower capacity unit. The principal advantage of using a larger battery is to be able to restart repeatedly. If you regularly don't ride long enough to recharge fully between restarts, stay with a larger capacity battery. A lower amp-hour battery will need to be trickle-charged more often.
For 1999, Ducati redesigned the electrical system, going from the 350 watt design to a 500 watt three-phase system. (Three-phase alternators have three wires coming out of them, single-phase have two.) They produce an AC output that has a higher frequency than the earlier single-phase design so the regulator presumably has to do less work (i.e. less heat) conditioning the waveform and converting it to DC. The new alternator also has additional wattage available to run the lights, fuel pump, ECU and accessories but the higher output still has to pass through the regulator.
http://www.ducati-upnorth.com/tech/chargingfailure.php
Probably this cable
33 amp, 3mm sq. 44/0.30
http://www.vehicle-wiring-products.eu/product.php/972/