Wassel type conversion on a Variatronic

[Bristol Daz]

As mentioned in the Varitronic fault thread below, I though I'd start a new topic for this.

I changed over to Varitronic last year from a previously DC converted BGM stator which failed. I always assumed you were unable to convert the varitronic which now appears to be incorrect, so.......

Is the conversion working well?
How is it done?
Can I do it myself?

Over to you Wack/Captain Pugwash, any chance of spiling the beans.

[Donnie]

Didnt think this was possible as there's been lots of questions about such for a number of years including from myself and is the reason why when my variotronic started acting up (lighting coils) I decided against a new £100 stator and went for the indian flywheel / stator and wassel and havent looked back.

[Rich Oswald]

Not relative to the thread but Top Avatar Bristol Daz.

Rich'

[Bristol Daz]

I didn't think it was possible either, but apparently Wack has one done/thought up by Captain Pugwash as mentioned on the other thread

Yes I know Rich we're vile and we know we are

[Captain Pugwash]

I converted Wacks stator but I was unable to run it and check voltages as I didn't have a flywheel.

I converted it without re-wiring any bobbins as if it didn't work it could easily be put back to standard.

On the variatronic two coils are ac the third although it looks like it's connected to the first two is wired seperately but shares a common connection.

Moving a couple of connections around allowed all three coils to be joined in series this will give maximum voltage at the expense of some current but it was the best way I could think of using all the developed power in one circuit without a complete re-wire.

I can think of a better way of wiring it which would give a better supply but it would need a complete re-wire.

The thing is the pick up/charge coil is wired independant of the lighting and only shares an earth point at the rectifier/regulator as standard.

Wack will have to test the stator and give feed back for others, Ive told him it's no secret how it's been wired and if it works then he's free to share it with anyone if he wants to.

[Donnie]

ah so it's not actually confirmed yet that it works as a wassel conversion ?

[Captain Pugwash]

ah so it's not actually confirmed yet that it works as a wassel conversion ?

I think Wack will let you know either way.

[Mel K]

My money's on it working ! Go Captain !

[Bristol Daz]

My money's on it working ! Go Captain !

I'm hoping so, am really missing those dc lights!!!!!

[Wack]

Thanks to Mark, I can confirm that the Vari/Wassel conversion does work. Voltage when running with the lights off shows 14.5v dropping to 12.2v with the lights on. I run a 55/60 H4 front and LED rear , Stage 6 EGT and an Acewell speedo with the Beedspeed AC/DC switch from a 9Ah alarm battery .I'm not quite sure how Mark wired it up as he replaced the resin over the connections but so far so good. The backplate needed a corner grinding to avoid trapping a yellow. Thanks again Mark

[Bristol Daz]

Thanks for the update Wack

So is there any chance of a bit more detail on the connections Cap?

Or would you rather convert one for a small fee?

[GP240]

So a Casatronic kit could be converted too ?

Any Chance of a basic wiring diagram using the Wassell Reg/rect please (pretty please)

[Wack]

It wires up the same as the electronic kits. Stator yellows to Wassel yellows, black to earth , red to battery +,loom to battery + with a fuse inline.

[Captain Pugwash]

I don't normally do any work except on a very few of my mates scooters and only ever as a favour. I would sooner work on my own scooters.
but as I knew in my mind how to do the variatronic to work with the Wassel type reg/rec I offered to do Wacks for free so that "if it worked" then others would know that it is possible.

The conversion that Ive done was on the standard stator without a rewire, instead just altering a couple of connections leaving all three coils in series.

The stator arrived with the original resin removed. With all of the three original lighting wires still connected.

All I've done is unsolder the three wires plus the ac lighting coil earth, then I checked the impedance on the three lighting coils which showed two were wound in series in a continuous wire used on both coils and the other coil is wound seperately and was also originally connected via a soldered joint to the first two coils, this coil originally shares a common connection at the rectifier with the ac side the other side of the third coil originally supplied the DC power but only a lowish amperage.

From memory I think this coil is wired out of phase with the ac so two seperately supplied circuits share one connection.

Now that 3rd coil is joined in series with the first two coils supplying an alternating current to the wassel from two yellows one on each end of the three coils. I think Lloyd needs to run the conversion a little longer to prove its worth. Then If it's any good and Then if anyone else wants to try this conversion as I've done it.
It appears all that's needed is a yellow connected to the now unearthed original earth wire and from the opposite end of "three coils in series" is the new attached yellow.

But I can think of a another way of doing this type of conversion that might prove better.

I did take a couple of pics before mid point and after but they don't really show much.

Although the Variatronic seems to be a modern stator it's a very basic 4 pole flywheel over three lighting coils, so without fully testing outputs I can't say it would produce much more lighting power than a standard 12v 6 pole Ducati system.

The Variatronic system will run at a lower frequency for the same rpm owing to its design.

One advantage of the Variatronic is the single LT charge coil that runs the ignition, having no pick up there are less connections making stator ignition faults less likely plus a decent ignition advance built into the variatronic CDI.

[GP240]

Thanks for the reply Cap'n, will keep on eye on this thread an hopefully Wacks proves to be a good choice.

I have run a Vario before and in 5yrs not had to touch it, this is the reason I went for the Casa, if it can be 'wassle' converted then am happy.

[Bristol Daz]

Top info Cap, I'll keep a weathered eye on this and if all is well I will do mine, just takes a bit of thought for non electricians