is a startmotor of a S2 the same as one of the 907?

[ducbertus]

I have a startmotor of a ST2 laying around and want to check it, do the mod of earthing the - brush by a decent cable.
just need to be sure that they are the same. so I can swap the starter motors in one action.

Bertus

[Finnpaso]

I think, that if mechanical measurements are same, then You can use it. There cant be big difference with needeed current, so that electrical part you can forget. I havent look mine closer, but i quess, they are exact samekind, maybe from another manuafacturer, but that is not problem at all....

[ducbertus]

Hi Annti,

I knew you would post a reply. To be honest, I saw an article about startmotors where the writer changed the standard starter, which contains 2 brushes into 4 brushes. this doubles the torq of the starter and has a dramatic improvement on the starting of the big twins. That's what I aiming for.

regards, Bertus

[Tamburinifan]

the writer changed the standard starter, which contains 2 brushes into 4 brushes.

Not so easy, been looking into that, too. Lotsa modding of the brusher plate etc.
Do you have a link?

I also think the st motor works. Different gearing on some newer but think that is f 4V.
IIRC....

[ducbertus]

Hi tamburinifan,

it seems that there is a possibility to use a brush plate with already 4 brushes.
not every 4-brush plate will fit. some brush plates have the spring to far out, causing short cicuit.

so far I'vent any links to some articles about this subject sofar.

Bertus

[Tamburinifan]

Friend of mine tried to adapt similar 4 brushes to st engine, no luck.

I bought one, too. Sould give more ooomphh f starter
but not so easy to do even if that was almost the same.

But I´m listening....

[907pasonut]

To be honest, I saw an article about startmotors where the writer changed the standard starter, which contains 2 brushes into 4 brushes. this doubles the torq of the starter and has a dramatic improvement on the starting of the big twins. That's what I aiming for.

regards, Bertus

Bertus, there is no need to replace the starter motor, just fit a deka battery...that will kick the paso into life...if it still hesitates to start then fit heavier cables...nothing wrong with original starter