| Magneto coil failure, a question for the techincal ones [message #777988] |
Sat, 15 July 2006 04:38 |
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I have read this group for years and have been amazed at some of the in
depth answers to odd questions, this is mine.
What could cause a "magneato coil,source coil,current coil", it goes by
different names but not the little "pick-up coil,trigger coil", to go
bad?" It has open windings".
Its on a 1990 yz490, cdi ignition with no apperant physical damage to
the magneato coil and no moisture around it.
The only thing done previous was to richen the jetting up a lot,"up 10
on the main and 5 on the pilot".
It may have fouled the plug and then failed or failed first.
Engine to frame ground is good.
All replies welcome as i have a new coil coming and dont want a
re-peat.
Do these just get old?
Thanks in advance for your wisdom.
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| Re: Magneto coil failure, a question for the techincal ones [message #778006 ] |
Sat, 15 July 2006 07:13 |
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<dirtbike483 [at] verizon.net> wrote in message
news:1152931134.328704.203090 [at] 75g2000cwc.googlegroups.com...
> I have read this group for years and have been amazed at some of the in
> depth answers to odd questions, this is mine.
> What could cause a "magneato coil,source coil,current coil", it goes by
> different names but not the little "pick-up coil,trigger coil", to go
> bad?" It has open windings".
> Its on a 1990 yz490, cdi ignition with no apperant physical damage to
> the magneato coil and no moisture around it.
> The only thing done previous was to richen the jetting up a lot,"up 10
> on the main and 5 on the pilot".
> It may have fouled the plug and then failed or failed first.
> Engine to frame ground is good.
> All replies welcome as i have a new coil coming and dont want a
> re-peat.
> Do these just get old?
> Thanks in advance for your wisdom.
You said the windings were open. Correct? Were they potted? Encased in
epoxy? Reason I ask is that we had nearly a decade of transformers going
bad at Tektronix that failed because the brown colored epoxy would crack
with age and allow moisture enter and reducing the efficiency of the
transformer. Things would run so inefficiently that they would blow the
appropriate fuse after 20 minutes of operation. Replacement of the
tranformers with ones encased in a silastic compound cured the problem.
Maybe it could affect motorcycles as well.
Joe
XL600R
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| Re: Magneto coil failure, a question for the techincal ones [message #778018 ] |
Sat, 15 July 2006 18:13 |
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Joe Rooney wrote:
> <dirtbike483 [at] verizon.net> wrote in message.
>
> You said the windings were open. Correct? Were they potted? Encased in
> epoxy? Reason I ask is that we had nearly a decade of transformers going
> bad at Tektronix that failed because the brown colored epoxy .......................
>
> Joe
The winding was a very fine wire that had a amber colored coating on it
and when you tried to un-do the wire, it would only pull a little bit
before breaking.
The entire winding was covered with a tape that looked like that tape
you use for bandages and was also covered with that amber coating.
I tried to un-do the wire to look for burn marks, but did not see any,
but it was "open" some where inside.
I didn't see any signs of water,"no rust or moisture present",but i
didn't pull the cover till a few days later and it could have
evaporated.
Your reply did help as i didn't know the coating could break down.
It is a air cooled 490 and vibrates like a pig.
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| Re: Magneto coil failure, a question for the techincal ones [message #778019 ] |
Sat, 15 July 2006 18:18 |
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dirtbike483 [at] verizon.net wrote:
> Joe Rooney wrote:
>
>><dirtbike483 [at] verizon.net> wrote in message.
>>
>>You said the windings were open. Correct? Were they potted? Encased in
>>epoxy? Reason I ask is that we had nearly a decade of transformers going
>>bad at Tektronix that failed because the brown colored epoxy .......................
>>
>>Joe
>
>
>
> The winding was a very fine wire that had a amber colored coating on it
> and when you tried to un-do the wire, it would only pull a little bit
> before breaking.
> The entire winding was covered with a tape that looked like that tape
> you use for bandages and was also covered with that amber coating.
> I tried to un-do the wire to look for burn marks, but did not see any,
> but it was "open" some where inside.
> I didn't see any signs of water,"no rust or moisture present",but i
> didn't pull the cover till a few days later and it could have
> evaporated.
> Your reply did help as i didn't know the coating could break down.
> It is a air cooled 490 and vibrates like a pig.
>
It probably just failed from age, engine vibration, and
heat. Since it isn't encapsulated, you could probably get it
rewound. Here's a good place to look:
http://www.rickystator.com/
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| Re: Magneto coil failure, a question for the techincal ones [message #778021 ] |
Sat, 15 July 2006 19:32 |
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On Sat, 15 Jul 2006 16:18:18 GMT, Chris Buckley
<cnbuckley [at] less.spam.earthlink.net> wrote:
>dirtbike483 [at] verizon.net wrote:
>> Joe Rooney wrote:
>>
>>><dirtbike483 [at] verizon.net> wrote in message.
>>>
>>>You said the windings were open. Correct? Were they potted? Encased in
>>>epoxy? Reason I ask is that we had nearly a decade of transformers going
>>>bad at Tektronix that failed because the brown colored epoxy .......................
>>>
>>>Joe
>>
>>
>>
>> The winding was a very fine wire that had a amber colored coating on it
>> and when you tried to un-do the wire, it would only pull a little bit
>> before breaking.
>> The entire winding was covered with a tape that looked like that tape
>> you use for bandages and was also covered with that amber coating.
>> I tried to un-do the wire to look for burn marks, but did not see any,
>> but it was "open" some where inside.
>> I didn't see any signs of water,"no rust or moisture present",but i
>> didn't pull the cover till a few days later and it could have
>> evaporated.
>> Your reply did help as i didn't know the coating could break down.
>> It is a air cooled 490 and vibrates like a pig.
>>
>
>It probably just failed from age, engine vibration, and
>heat. Since it isn't encapsulated, you could probably get it
>rewound. Here's a good place to look:
>http://www.rickystator.com/
They were unable to repair the stator from my GasGas which is exactly
the same as a KTM. They wasted my time, but did give me a full refund
including 1/2 the total shipping.
Jack Bondus, who will be at the Spodefest, is a GasGas dealer in MN.
He was kind enough to loan me a brand new stator so I could race the
National enduro. With Smackover Motorsports closed up, Jack is now my
GasGas dealer.
Mike Baxter --------------- "All GasGas, All The Time"
2005 GasGas EC300, 2000 GasGas EC300, 1997 GasGas JXT270
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| Re: Magneto coil failure, a question for the techincal ones [message #778054 ] |
Sun, 16 July 2006 15:36 |
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On 14 Jul 2006 19:38:54 -0700, dirtbike483 [at] verizon.net blathered:
Vibration related failures kill most of them.
>Do these just get old?
Heck, even rocks get old.
>Thanks in advance for your wisdom.
I merely have you fooled.
MX Tuner
'03 Honda CRF480R
'06 Suzuki Hayabusa 1300
'06 Nissan Titan LE
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| Re: Magneto coil failure, a question for the techincal ones [message #778055 ] |
Sun, 16 July 2006 15:36 |
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On Sat, 15 Jul 2006 10:32:47 -0700, Mike Baxter <m"who" [at] comcast.net>
blathered:
> With Smackover Motorsports closed up, Jack is now my
>GasGas dealer.
Say what? SMS closed? Details please!
MX Tuner
'03 Honda CRF480R
'06 Suzuki Hayabusa 1300
'06 Nissan Titan LE
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| Re: Magneto coil failure, a question for the techincal ones [message #778069 ] |
Sun, 16 July 2006 19:03 |
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On Sun, 16 Jul 2006 09:36:54 -0400, MX Tuner
<mxtuner [at] nospam.comcast.net> wrote:
>On Sat, 15 Jul 2006 10:32:47 -0700, Mike Baxter <m"who" [at] comcast.net>
>blathered:
>
>
>> With Smackover Motorsports closed up, Jack is now my
>>GasGas dealer.
>
>Say what? SMS closed? Details please!
http://www.smackovermotorsports.com/bb/showthread.php?s=ad26 ad00ea66333b63a467c1ef09951b&t=2509
>MX Tuner
DJ
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| Re: Magneto coil failure, a question for the techincal ones [message #785203 ] |
Mon, 17 July 2006 04:42 |
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On 15 Jul 2006 09:13:06 -0700, dirtbike483 [at] verizon.net wrote:
>It is a air cooled 490 and vibrates like a pig.
From what I understand of those bikes, that's a feature not a bug.
Good luck with the stator!
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| Re: Magneto coil failure, a question for the techincal ones [message #785307 ] |
Mon, 17 July 2006 23:55 |
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On Sun, 16 Jul 2006 11:03:23 -0600, IdaSpode <not [at] home_watching.tv>
blathered:
>>Say what? SMS closed? Details please!
>
> http://www.smackovermotorsports.com/bb/showthread.php?s=ad26 ad00ea66333b63a467c1ef09951b&t=2509
Jees! Damn, I hate to hear stuff like that.
MX Tuner
'03 Honda CRF480R
'06 Suzuki Hayabusa 1300
'06 Nissan Titan LE
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