STARTER MOTOR?
-
Crusher
STARTER MOTOR?
- Finnpaso
- paso grand pooh-bah
- Posts: 3091
- Joined: Mon Jul 26, 2004 12:00 am
- year: 0
- Location: Finland
Re: STARTER MOTOR?
Did U measured with multimeter that 12V is coming TO solenoid primary circuit when ignition is on, kill switch is RUN position and U push start button? U told that it works when put screwdriver over solenoid, so, if it then turns starter normally, no need to open starter. To turn engine starter have to had:
1. +12V from starter button to PRIMARY CIRCUIT of solenoid (U can measure it by multimeter esily)
2. +12V from battery to input terminal of solenoid SECONDARY CIRCUIT AND when 12V is coming to primary circuit, then also 12V have to be in output terminal of solenoid=> 12V goes to starter motor and turns engine. (easy to measure with multimeter)
3. IF U have still that very bad Lucas solenoid, its earthing must be also OK, as it groungs via its cover/case to ground. (easy to measure again with ohm scale with multimeter).
I throw away that Lucas long time ago and put Hitachi solenoid from newer Ducati modells(need small modification to primary circuit connections). No problems since with 750 solenoid. Hitachi neeeds own earth to primary circuit. 907IE have that Hitachi unit.
If starter motor is gone/blown/brushes worn out, then only way is to open left side cover of engine, as starter have 2 screws outside and one(!!!) from inside engine. Somebody have changed brushes without opening left side of engine, but it needs really small/young flexible fingers...
1. +12V from starter button to PRIMARY CIRCUIT of solenoid (U can measure it by multimeter esily)
2. +12V from battery to input terminal of solenoid SECONDARY CIRCUIT AND when 12V is coming to primary circuit, then also 12V have to be in output terminal of solenoid=> 12V goes to starter motor and turns engine. (easy to measure with multimeter)
3. IF U have still that very bad Lucas solenoid, its earthing must be also OK, as it groungs via its cover/case to ground. (easy to measure again with ohm scale with multimeter).
I throw away that Lucas long time ago and put Hitachi solenoid from newer Ducati modells(need small modification to primary circuit connections). No problems since with 750 solenoid. Hitachi neeeds own earth to primary circuit. 907IE have that Hitachi unit.
If starter motor is gone/blown/brushes worn out, then only way is to open left side cover of engine, as starter have 2 screws outside and one(!!!) from inside engine. Somebody have changed brushes without opening left side of engine, but it needs really small/young flexible fingers...
Antti http://www.youtube.com/watch?v=HeKOh3XoXPg&NR=1
KTM 990 Adventure -08 metal dark grey
Paso 750 -89 red/metal grey
907IE -91 red/metal grey
907IE -91 red
2xST4S -02 red/metal grey
ST2 -01 red/metal grey
Volvo V70 Bi-Fuel Classic/titanium
KTM 990 Adventure -08 metal dark grey
Paso 750 -89 red/metal grey
907IE -91 red/metal grey
907IE -91 red
2xST4S -02 red/metal grey
ST2 -01 red/metal grey
Volvo V70 Bi-Fuel Classic/titanium
- Finnpaso
- paso grand pooh-bah
- Posts: 3091
- Joined: Mon Jul 26, 2004 12:00 am
- year: 0
- Location: Finland
Re: STARTER MOTOR?
You are lucky, if You have 50% / 50%!!!Crusher wrote: as I seem to spend more time fixing this lemonthan I do ridding it.
Antti http://www.youtube.com/watch?v=HeKOh3XoXPg&NR=1
KTM 990 Adventure -08 metal dark grey
Paso 750 -89 red/metal grey
907IE -91 red/metal grey
907IE -91 red
2xST4S -02 red/metal grey
ST2 -01 red/metal grey
Volvo V70 Bi-Fuel Classic/titanium
KTM 990 Adventure -08 metal dark grey
Paso 750 -89 red/metal grey
907IE -91 red/metal grey
907IE -91 red
2xST4S -02 red/metal grey
ST2 -01 red/metal grey
Volvo V70 Bi-Fuel Classic/titanium
- persempre907
- paso grand pooh-bah
- Posts: 3312
- Joined: Tue Dec 06, 2005 12:00 am
- model: 907 I.E.
- year: 1992
- Location: Roma, Italia
Re: STARTER MOTOR?
These old Ducati aren't as reliable as the contemporary Hondas, but I wouldn't say they are lemons
.
They need much more care, above all with the electrics which need to be dry (with dielectric grease) and with no sign of corrosion over the connections.
So, if you fix those little things, you'll have no more too much issues.
Ciao
They need much more care, above all with the electrics which need to be dry (with dielectric grease) and with no sign of corrosion over the connections.
So, if you fix those little things, you'll have no more too much issues.
Ciao
Francesco
Ducati 907IE 1992 Rosso
Ducati 907IE 1993 Nero
Moto Guzzi Galletto 1960 Sabbia
BMW R Nine t 2019
Ducati 907IE 1992 Rosso
Ducati 907IE 1993 Nero
Moto Guzzi Galletto 1960 Sabbia
BMW R Nine t 2019
- Finnpaso
- paso grand pooh-bah
- Posts: 3091
- Joined: Mon Jul 26, 2004 12:00 am
- year: 0
- Location: Finland
Re: STARTER MOTOR?
Crusher, as You see, also Frankie start to be soon electrician!

Antti http://www.youtube.com/watch?v=HeKOh3XoXPg&NR=1
KTM 990 Adventure -08 metal dark grey
Paso 750 -89 red/metal grey
907IE -91 red/metal grey
907IE -91 red
2xST4S -02 red/metal grey
ST2 -01 red/metal grey
Volvo V70 Bi-Fuel Classic/titanium
KTM 990 Adventure -08 metal dark grey
Paso 750 -89 red/metal grey
907IE -91 red/metal grey
907IE -91 red
2xST4S -02 red/metal grey
ST2 -01 red/metal grey
Volvo V70 Bi-Fuel Classic/titanium
- persempre907
- paso grand pooh-bah
- Posts: 3312
- Joined: Tue Dec 06, 2005 12:00 am
- model: 907 I.E.
- year: 1992
- Location: Roma, Italia
Re: STARTER MOTOR?
I'm the real LEMON

Francesco
Ducati 907IE 1992 Rosso
Ducati 907IE 1993 Nero
Moto Guzzi Galletto 1960 Sabbia
BMW R Nine t 2019
Ducati 907IE 1992 Rosso
Ducati 907IE 1993 Nero
Moto Guzzi Galletto 1960 Sabbia
BMW R Nine t 2019
-
Crusher
Re: STARTER MOTOR?
Finnpaso wrote:Crusher, as You see, also Frankie start to be soon electrician!![]()