Rewire issues on 89 900 ss

discussion about the 750 Sport and '89/'90 900SS, which share many mechanicals with the Paso series
HIGHWAY89
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model: 900 SS
year: 1989
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Rewire issues on 89 900 ss

Post by HIGHWAY89 »

Got some confusion with befitting my main harness, firstly with solenoid and starter motor , should I have a cable between the two , also the small black single cable coming from digiplex unit is just a earth to frame, any help appreciated
HIGHWAY89
paso grand pooh-bah
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Joined: Sat Jul 16, 2016 6:35 am
model: 900 SS
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Re: Rewire issues on 89 900 ss

Post by HIGHWAY89 »

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HIGHWAY89
paso grand pooh-bah
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Joined: Sat Jul 16, 2016 6:35 am
model: 900 SS
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Re: Rewire issues on 89 900 ss

Post by HIGHWAY89 »

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HIGHWAY89
paso grand pooh-bah
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model: 900 SS
year: 1989
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Re: Rewire issues on 89 900 ss

Post by HIGHWAY89 »

As soon as I sent that I realised how dumb it was then I found a lone cable hangin in the shadows
HIGHWAY89
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Joined: Sat Jul 16, 2016 6:35 am
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Re: Rewire issues on 89 900 ss

Post by HIGHWAY89 »

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I think it's right now , in the 2nd pic I'm about to send does the earth from digiplex carry onto engine as I have shown , 1st pic is solenoid wiring now
HIGHWAY89
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Re: Rewire issues on 89 900 ss

Post by HIGHWAY89 »

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HIGHWAY89
paso grand pooh-bah
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Joined: Sat Jul 16, 2016 6:35 am
model: 900 SS
year: 1989
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Re: Rewire issues on 89 900 ss

Post by HIGHWAY89 »

Or does it just stop at the frame
Tamburinifan
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Re: Rewire issues on 89 900 ss

Post by Tamburinifan »

Positive from battery - solenoid - starter.

Image
Gert

907 I.E. -91
M900 -97
MTS 1100s -07
HIGHWAY89
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Re: Rewire issues on 89 900 ss

Post by HIGHWAY89 »

Thanks Gert that all makes sense , in this next pic does the battery setup look right , electrical obviously not a strong point of mine, the next biggie for me will be connecting the regulator correctly , your help much appreciated
HIGHWAY89
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Re: Rewire issues on 89 900 ss

Post by HIGHWAY89 »

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HIGHWAY89
paso grand pooh-bah
Posts: 637
Joined: Sat Jul 16, 2016 6:35 am
model: 900 SS
year: 1989
Location: Australia

Re: Rewire issues on 89 900 ss

Post by HIGHWAY89 »

The earth strap going to the rear of the engine looks all wrong but was like that when I got the bike , the thread on the case looks to be for an adjustable cable ?
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paso750
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Re: Rewire issues on 89 900 ss

Post by paso750 »

I know it's painful on a new bike but the paint should be removed where the ground cables are installed.
MatthiB
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model: 900 SS
year: 1990
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Re: Rewire issues on 89 900 ss

Post by MatthiB »

HIGHWAY89 wrote:The earth strap going to the rear of the engine looks all wrong but was like that when I got the bike , the thread on the case looks to be for an adjustable cable ?
Hi,

your set up is the way Ducati did it.
The M8 thread is for engine earth, no other purpose
So everything the right way.

But it turned out, that going that original way with two short earth cables to the frame (one from the battery and the back one) was not ideal.
It could build up top much resistance especially for the starting circuit.
So having a longer earth cable direct from the battery - to the thread on the case makes a difference.
I think Ducati made it that way with their later models.
HIGHWAY89
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Re: Rewire issues on 89 900 ss

Post by HIGHWAY89 »

Thanks Matt I will make a new cable ( same size?) Thanks Paso 750 I'm definitely holding off on the vandalism for the earths
MatthiB
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Joined: Sun Dec 31, 2017 8:35 am
model: 900 SS
year: 1990
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Re: Rewire issues on 89 900 ss

Post by MatthiB »

Yes, same size cable at least.
On mine I have a Motolectric cable kit.
Maybe you like to read through their blog on that topic:
http://motolectric.com/products/hicap.detail.html
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