a TWO WIRE stator is single phase
the 3 wire stators on the paso's are split phase not 3 phase Ducati made no 3 phase stators prior to the 99 model year. ( there are also some 2 wire split phase on Paso's I am told)
On the two wire stators(97/98ST2) the coils are wired in series
On the 3 wire they are wired in parallel( 2 phase @ 90 degrees, split phase)
Many Bevel guys have installed the single phase ST2 stator or changed their stock stators from split phase to single phase sucessfully allowing more modern lighting with out draining the batteries
The ST2 stator is two wire single phase for 97 and 98 years
On these stators you can use the same regulator they are wired up differently.
I have done a lot of research on the single Phase stators. If you go single phase you need to put the regulator where it will get good airflow as the will produce a lot more heat regulating a single phase. In fact the regulators sold by everyone are the same models for the Paso and the ST2( 97/98)
ST2's are notorious for burning up both the stator and the regulator. YOU MUST MOVE IT !!!
The Mosfet regulator is your best bet for not eventually burning out your stator from bad connections( corrosion and undersized wire) or additional loading, gloves, lights etc. You can get one here.....
http://roadstercycle.com/Shindengen%20F ... %20kit.htm
depending on the kit you order it is between 125 and 145 USD about the same as electrex or electrosport
99 and later ST2 are 3 phase and as stated before require changing the crank and since the magnet rotates outside the stator most likely the case and other related parts
They also require a 6 diode regulator, The Paso is 4 diodes
I t is possible to use a 4 diode regulator on a 3 phase system but you will fry your electronics with voltage spikes from the unregulated third winding if your battery can't handle it. Most likely you will also cook your battery putting an ac voltage across it.( blow it up you will
)
One additional note, when you replace a split phase stator with a single phase according to the theory you should get more wattage if you also wire it up with a good quality 18 gauge wire from the stator to the regulator and the battery source.. On most bikes the amperage from the stator is a function of the load more than the rotor or stator windings...in theory.
The one long winding as opposed to the two shorter windings should produce a higher voltage with the same rotor so if the amp loading stays the same you will get more watts... watts = amps x volts
The trick appears to be lowering the resistance between the battery,regulator and stator ...Replacing the crap stock wiring with 18 or 16 gauge wires with as few connections as possible. I also plan to rewire my stator with a higher quality wire to help it handle the load, I may change the stator wire size as well but have not decided yet whether to go up or down on the gauge size or leave it alone
A stronger magnet( Rotor) will give you more across the board from any stator. More on this coming in the future I don't think the magnets of the ST2 are stronger than the Paso. The change seems to be made to increase the oil cooling of the stator. The mod to install the washer was also intended to help keep the stator cooler There are better quality wires these days so it may not be a problem to do all this to a Paso
I plan to put all this to the test soon as I have fried my stator and regulator in the 906. If it all works out according to the theory I'll do the same to the 907 which is still working as designed but my new silverlight dual headlights drain the battery in about an hour if I don't keep the RPM above 3500.Even with the headlights off it only puts out 12.5 volts at idle For now I put a switch in to turn them off and let the battery charge back up. I did get stopped once for not having my headlights on but told the constable,Oops! I forgot
