750 wiring issue -- smoking wire [1 Attachment]

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750 wiring issue -- smoking wire [1 Attachment]

Virago Tech Archive (YahooGroups) mailing list
Hi Folks.I started  my 1981 Virago 750 yesterday and it stalled a couple times. after starting it again, I saw what looked to be fire and then smoke coming from the left side crank case cover, where some wires go into the case. I shut the bike off right away. I have a pic attached. The screwdriver is pointing to the spot where the wires go in. Can anyone tell me what may have happened? And what I need to do? Thanks for any help.
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Re: 750 wiring issue -- smoking wire

Virago Tech Archive (YahooGroups) mailing list
On the 1100 (and I think the 750), that is where the wires from the stator
coils exit the crank case. Your screwdriver is pointing to the wires from
the stator. I do not know why it would smoke though. In my case I have
problems with oil leaking from that area (as I have has the case covers off
more than once), so is it possible that you are seeing smoke from burning
oil?
It may be prudent to check the wire in question with an ohm meter just make
certain there is still continuity on it.

-- Dante

On 31 July 2016 at 06:29, [hidden email] [ViragoTech] <
[hidden email]> wrote:

>
> [Attachment(s) <#m_7704924633557889821_TopText> from [hidden email]
> [ViragoTech] included below]
>
> Hi Folks.I started  my 1981 Virago 750 yesterday and it stalled a couple
> times. after starting it again, I saw what looked to be fire and then smoke
> coming from the left side crank case cover, where some wires go into the
> case. I shut the bike off right away. I have a pic attached. The
> screwdriver is pointing to the spot where the wires go in. Can anyone tell
> me what may have happened? And what I need to do? Thanks for any help.
>
>
>
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Re: 750 wiring issue -- smoking wire

Virago Tech Archive (YahooGroups) mailing list
On my XV 1100 that same wire melted against the exhaust  . The location was a little north of where your screwdriver is pointing.

Sent from my iPad

> On Jul 31, 2016, at 1:37 PM, 'Dante, The Wicked Armadillo' [hidden email] [ViragoTech] <[hidden email]> wrote:
>
> On the 1100 (and I think the 750), that is where the wires from the stator coils exit the crank case. Your screwdriver is pointing to the wires from the stator. I do not know why it would smoke though. In my case I have problems with oil leaking from that area (as I have has the case covers off more than once), so is it possible that you are seeing smoke from burning oil?
> It may be prudent to check the wire in question with an ohm meter just make certain there is still continuity on it.
>
> -- Dante
>
>> On 31 July 2016 at 06:29, [hidden email] [ViragoTech] <[hidden email]> wrote:
>>  
>> [Attachment(s) from [hidden email] [ViragoTech] included below]
>> Hi Folks.I started  my 1981 Virago 750 yesterday and it stalled a couple times. after starting it again, I saw what looked to be fire and then smoke coming from the left side crank case cover, where some wires go into the case. I shut the bike off right away. I have a pic attached. The screwdriver is pointing to the spot where the wires go in. Can anyone tell me what may have happened? And what I need to do? Thanks for any help.
>>
>
>
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Re: 750 wiring issue -- smoking wire

Virago Tech Archive (YahooGroups) mailing list
In reply to this post by Virago Tech Archive (YahooGroups) mailing list
<Copy/pasted, as I thought I sent this to the group>

Actually, before you pull the cover, find the connectors at the end of
the stator wires, probably this should be near the
regulator/rectifier. Unplug the stator wires, and use an ohm meter at
the connector. I do not know what the actual reading should be, but it
should show some continuity, and I would expect a value under 100 ohms
(I would expect a value below 10 ohms, to be honest). The stator, from
an electrical standpoint is sort of like an electric motor running backwards, so
you get voltage out of it when you spin it (instead of getting
rotation out of it when you put in voltage/current).
But to get back to the point here, you are checking to see if there is
a current path through the stator. Also see what happens if you wiggle
the wires where it smoked while you read the ohm meter. The Reading
should not change when you do this. If there is no continuity, or the
readings change when the wire is moved, then there is something wrong
with the stator. If there is nothing wrong with the stator, then the
problem is one of those esoteric mechanical things, and sadly I do not
have so much skill with them.

As far as pulling the case cover goes, well, I have only done this on
the 1100. If the 750 is like that, you will need to open the cover
where the solenoid/starter relay is connected to the starter shaft.
This is the small plate on the upper left side of the cover assembly.
There, you will need to disconnect the solenoid from the starter
shaft, it is a large torx screw on mine. You may need to also remove
the solenoid/relay from cover plate (I do not remember if I had to do
that or not, but it should be two bolts holding it in). After that, I
think after you disconnect the stator wires, and the gear shift lever
you can pull the cover. I would caution you however, not to pull the
cover unless you have to, as I have had a rough time getting it to
seal properly afterwards.

-- Dante

On 31 July 2016 at 10:47, Dante, The Wicked Armadillo
<[hidden email]> wrote:

> Actually, before you pull the cover, find the connectors at the end of
> the stator wires, probably this should be near the
> regulator/rectifier. Unplug the stator wires, and use an ohm meter at
> the connector. I do not know what the actual reading should be, but it
> should show some continuity, and I would expect a value under 100 ohms
> (I would expect a value below 10 ohms, to be honest). The stator, from
> an electrical standpoint is sort of like a motor running backwards, so
> you get voltage out of it when you spin it (instead of getting
> rotation out of it when you put in voltage/current).
> But to get back to the point here, you are checking to see if there is
> a current path through the stator. Also see what happens if you wiggle
> the wires where it smoked while you read the ohm meter. The Reading
> should not change when you do this. If there is no continuity, or the
> readings change when the wire is moved, then there is something wrong
> with the stator. If there is nothing wrong with the stator, then the
> problem is one of those esoteric mechanical things, and sadly I do not
> have so much skill with them.
>
> As far as pulling the case cover goes, well, I have only done this on
> the 1100. If the 750 is like that, you will need to open the cover
> where the solenoid/starter relay is connected to the starter shaft.
> This is the small plate on the upper left side of the cover assembly.
> There, you will need to disconnect the solenoid from the starter
> shaft, it is a large torx screw on mine. You may need to also remove
> the solenoid/relay from cover plate (I do not remember if I had to do
> that or not, but it should be two bolts holding it in). After that, I
> think after you disconnect the stator wires, and the gear shift lever
> you can pull the cover. I would caution you however, not to pull the
> cover unless you have to, as I have had a rough time getting it to
> seal properly afterwards.
>
> --Dante
>
> On 31 July 2016 at 07:41, Peter Alicea <[hidden email]> wrote:
>> Thanks for your input. Is it difficult to remove the cover? I have the
>> screws loose now, but I amn wondering what is the next thing to do?
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Re: 750 wiring issue -- smoking wire

Virago Tech Archive (YahooGroups) mailing list
In reply to this post by Virago Tech Archive (YahooGroups) mailing list
Not sure by pic, but is that a naked wire or possibly pinched in the crank case cover causing a short?
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Re: 750 wiring issue -- smoking wire

Virago Tech Archive (YahooGroups) mailing list
No..the wires are not pinched. Tomorrow, I will take the crankcase off to see if their is an inside issue :) Wish me luck.
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Re: 750 wiring issue -- smoking wire

Virago Tech Archive (YahooGroups) mailing list
Good luck.

-- Dante

On 3 August 2016 at 14:07, [hidden email] [ViragoTech] <
[hidden email]> wrote:

>
>
> No..the wires are not pinched. Tomorrow, I will take the crankcase off to
> see if their is an inside issue :) Wish me luck.
>
>
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Re: 98 XV 1100 pilot screw

Virago Tech Archive (YahooGroups) mailing list
I am cleaning carbs. What is current wisdom on setting pilot screw? Current setting 1.5 turns out. Main jets are 114 front and 110 rear.
Thx
Jim

Sent from my iPad

> On Aug 4, 2016, at 3:56 PM, 'Dante, The Wicked Armadillo' [hidden email] [ViragoTech] <[hidden email]> wrote:
>
> Good luck.
>
> -- Dante
>
>> On 3 August 2016 at 14:07, [hidden email] [ViragoTech] <[hidden email]> wrote:
>>  
>> No..the wires are not pinched. Tomorrow, I will take the crankcase off to see if their is an inside issue :) Wish me luck.
>>
>
>
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Re: 98 XV 1100 pilot screw

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ViragoCarb
 
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ViragoCarb
 Vintage Yamaha Virago Rebuild Service, Sales & Obsolete Parts  |   |

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    On Monday, August 8, 2016 1:52 AM, "James Moore [hidden email] [ViragoTech]" <[hidden email]> wrote:
 

     I am cleaning carbs. What is current wisdom on setting pilot screw? Current setting 1.5 turns out. Main jets are 114 front and 110 rear.ThxJim

Sent from my iPad
On Aug 4, 2016, at 3:56 PM, 'Dante, The Wicked Armadillo' [hidden email] [ViragoTech] <[hidden email]> wrote:


    Good luck.

-- Dante

On 3 August 2016 at 14:07, [hidden email] [ViragoTech] <[hidden email]> wrote:

     No..the wires are not pinched. Tomorrow, I will take the crankcase off to see if their is an inside issue :) Wish me luck.  

 
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Re: 98 XV 1100 pilot screw

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In reply to this post by Virago Tech Archive (YahooGroups) mailing list
Pilot screws are 2.5 turns out, main jets are way too small if you have stock carbs

Sent from my iPhone

> On Aug 7, 2016, at 14:32, James Moore [hidden email] [ViragoTech] <[hidden email]> wrote:
>
> I am cleaning carbs. What is current wisdom on setting pilot screw? Current setting 1.5 turns out. Main jets are 114 front and 110 rear.
> Thx
> Jim
>
> Sent from my iPad
>
>> On Aug 4, 2016, at 3:56 PM, 'Dante, The Wicked Armadillo' [hidden email] [ViragoTech] <[hidden email]> wrote:
>>
>>  
>> Good luck.
>>
>> -- Dante
>>
>>> On 3 August 2016 at 14:07, [hidden email] [ViragoTech] <[hidden email]> wrote:
>>>  
>>> No..the wires are not pinched. Tomorrow, I will take the crankcase off to see if their is an inside issue :) Wish me luck.
>>>
>
>
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Re: 750 wiring issue -- smoking wire

Virago Tech Archive (YahooGroups) mailing list
In reply to this post by Virago Tech Archive (YahooGroups) mailing list
How did you get on?  I had a 'new' alternator fail on my XV750 which I
eventually found was due to crap manufacture in that inside the wires were
just twisted together - so overheated. I found this when I opened it up to
have a look and found a couple of the coils burnt out. I bought some
approrpriate gauge copper wire and rewound it - easier than I expected. I
also found that the connecting plug had frayed insulation and it is
possible that two wires had shorted - an alternative cause for the coil
burnout. Either way - all ok ever since!

HTH

Chris D

On 4 August 2016 at 02:07, [hidden email] [ViragoTech] <
[hidden email]> wrote:

>
>
> No..the wires are not pinched. Tomorrow, I will take the crankcase off to
> see if their is an inside issue :) Wish me luck.
>
>
>