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paulbrice
GRiSO Capo
GRiSO Capo
paulbrice

Posts : 737
Join date : 2015-01-04
Age : 58

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PostSubject: Re: GRiSO Startus Interuptus   GRiSO Startus Interuptus - Page 2 Icon_minitime1Fri Jul 20, 2018 1:04 am

Dave you are right - was trying to explain that if you splice in a big thick wire in parallel then you will drop the voltage loss along 95% of the route & it won't all get lost again in the final 5% ....but was in too much hurry to get it technically correct (as usual)....
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Georgios
Squinternotto
Squinternotto
Georgios

Posts : 9
Join date : 2018-07-12

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PostSubject: Re: GRiSO Startus Interuptus   GRiSO Startus Interuptus - Page 2 Icon_minitime1Fri Jul 20, 2018 2:51 pm

Kiwi_Roy wrote:
Yes replace the wire but on your model you are probably losing most across the ignition switch and the wire to and fro.
Better to snip the yellow wire feeding the relay and feed it direct from a new fuse at the battery, that's the usual fix.
That's what we did in addition. But without crimping on the thin wire.
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Georgios
Squinternotto
Squinternotto
Georgios

Posts : 9
Join date : 2018-07-12

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PostSubject: Re: GRiSO Startus Interuptus   GRiSO Startus Interuptus - Page 2 Icon_minitime1Fri Jul 20, 2018 3:02 pm

paulbrice wrote:
Dave you are right - was trying to explain that if you splice in a big thick wire in parallel ....
Maybe I got that wrong, but to connect one wire with another doesn't mean parallel. That's inline. scratch
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Kiwi_Roy
Biondino
Biondino
Kiwi_Roy

Posts : 254
Join date : 2017-11-09

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PostSubject: Re: GRiSO Startus Interuptus   GRiSO Startus Interuptus - Page 2 Icon_minitime1Wed Jul 25, 2018 7:46 pm

Georgios,
So now you have a new feed to the yellow wire near the relays.
And a new fatter wire from the relay to the solenoid
And you taped up the other yellow wire so it cannot short to chassis
The original small wire from relay to solenoid is not connected either end.

cheers you should not have any more starter issues
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Georgios
Squinternotto
Squinternotto
Georgios

Posts : 9
Join date : 2018-07-12

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PostSubject: Re: GRiSO Startus Interuptus   GRiSO Startus Interuptus - Page 2 Icon_minitime1Wed Jul 25, 2018 10:26 pm

Roy,

exactly, that´s what we did. Except that we went from the battery directly to the relay. And no more starter issues. Very Happy

What we also found is that the starter button needs to be pressed a little more firmly compared to japanese bikes. I would like to open it up and see if I can improve something.
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Oz1200Guzzi
Don Abbondio
Don Abbondio
Oz1200Guzzi

Posts : 3554
Join date : 2014-03-13
Age : 64

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PostSubject: Re: GRiSO Startus Interuptus   GRiSO Startus Interuptus - Page 2 Icon_minitime1Wed Jul 25, 2018 10:54 pm

Giorgios, that is, in essence, the normal fix. I hope you fused that wire to the battery?
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Georgios
Squinternotto
Squinternotto
Georgios

Posts : 9
Join date : 2018-07-12

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PostSubject: Re: GRiSO Startus Interuptus   GRiSO Startus Interuptus - Page 2 Icon_minitime1Thu Jul 26, 2018 1:11 am

Toni,

yes I did. 15 Ampere fuse.
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Oz1200Guzzi
Don Abbondio
Don Abbondio
Oz1200Guzzi

Posts : 3554
Join date : 2014-03-13
Age : 64

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PostSubject: Re: GRiSO Startus Interuptus   GRiSO Startus Interuptus - Page 2 Icon_minitime1Thu Jul 26, 2018 3:36 pm

Should be good, but keep a 20A on hand for that time it "might" blow - it's been known to happen before. I used to have a 10A fuse and then (at a most inconvenient time) it blew, now upgraded.
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Georgios
Squinternotto
Squinternotto
Georgios

Posts : 9
Join date : 2018-07-12

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PostSubject: Re: GRiSO Startus Interuptus   GRiSO Startus Interuptus - Page 2 Icon_minitime1Thu Jul 26, 2018 10:38 pm

Thanks, will put some of them in my tool bag.
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Kiwi_Roy
Biondino
Biondino
Kiwi_Roy

Posts : 254
Join date : 2017-11-09

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PostSubject: Re: GRiSO Startus Interuptus   GRiSO Startus Interuptus - Page 2 Icon_minitime1Fri Jun 07, 2019 9:48 pm

A little more information on the solenoids.
A friend gave me a solenoid off a Bosh starter so I thought I would pull it apart to check the coils.
To my surprise both coils have the same number of turns.
The heavy coil is wound on the bottom so it only uses a fraction of the wire that the outer coil does.
It's also heavier wire so it's resistance is much less.

The strength of a magnetic coil is dependent on the current x the number of turns
They both have the same number of turns therefore the relative strength is the ratio of the currents.
Therefore the inner coil is 4x as strong as the outer.
Then interestingly when you take your finger off the button both coils are effectively in series so the strengths will be the same.
BUT now one coil has the current reversed so the field is equal but opposite, in other words the fields cancel out so the solenoid lets everything go, that's pretty neat I reckon.
I didn't do a very good job of explaining that, I know.
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