Starter motor??

[greenmonster]

MOT test tomorrow so no test.
Still wondering how the starter could be wrong assembled...

[He Man]

If my understanding is correct, it'll then turn the correct way again - the 4 magnets inside are oriented N S N S, so each 90 degree turn (relative to the brushes) changes the direction of rotation.

big

There are only 2 screws holding it, so really, there is only 2 directions it can close, from left to right, NS, or SN. However it only closes 1 way ( atleast i was never able to close it the wrong way, it just wouldnt fit).

[Norm]

I still have the starter I referenced before, I'll get busy with it & report back.

[Howie]

One possibility I can think of for reversed polarity is if the previous owner made larger brushes from a different unit fit and the wires were long enough to reach wrong locations. 

[greenmonster]

Standard brushes & plate.



No test but a little thinking:

Brushes & plate only fits one way together and plate can`t be flipped and only fits housing one way:
http://www.ducati.ms/gallery/files/9/4/9/0/lid_housing.jpg
Little squares also inside housing and on plate & lid.

Magnets are 90 degrees apart, looking from gearside the 3 screws has an almost 120 degree pattern:
http://www.ducati.ms/gallery/files/9/4/9/0/gear_side.jpg
That means: Mounting housing 90 degrees wrong, positive lead screw fr solenoid gets in funny position (if possible),
I-you would notice that immediately. That wasn't the case here.

Thanks all f input so far, any more thoughts?

[Howie]

I can't remember...can the magnets be removed and reversed?  Goin' for longshots here

[He Man]

I can't remember...can the magnets be removed and reversed?  Goin' for longshots here

THey probably could be, i think they are attatched via glue.

[Speeddog]

I suppose it could be a starter from another bike, they're fairly generic.
That's a wild guess.

[He Man]

I suppose it could be a starter from another bike, they're fairly generic.
That's a wild guess.

that would make a lot of sense actually. They are just generic Denso starters found on kawis as well.

[greenmonster]

I suppose it could be a starter from another bike, they're fairly generic.

Not so impossible. Anyone know what the text on the plate is?
My original is so old, worn and repainted.
I`ll check the backwards one.

[greenmonster]

Plate says:

270 4001 1A
128 000 - 6050
12
        DENSO


And it's not the 999 etc one, does not look like this:



Something`s wrong w collector, reversed wiring or damage, is another theory.