motorbike ignition fault

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Robski
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Re: motorbike ignition fault

Post by Robski »

Fat Freddy wrote:To me, it kind of looks like it's tracking to ground.

What colour are your plugs?


FF

1&4 does but what about 2&3 ?

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Fat Freddy
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Re: motorbike ignition fault

Post by Fat Freddy »

I think the same.

First kick on the Primary and nothing on the secondary.

FF

tiggerbiker
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Re: motorbike ignition fault

Post by tiggerbiker »

here are the latest traces i have obtained - hope they are useful,
robski, your picture was very helpful - thanks

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Re: motorbike ignition fault

Post by tiggerbiker »

oops - heres the traces
Attachments
bandit12 coil 2+3.psdata
(192.35 KiB) Downloaded 423 times
bandit12 coil 1+4.psdata
(202.87 KiB) Downloaded 402 times
ign. pickup + pri. amps.psdata
(1.88 MiB) Downloaded 413 times

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Robski
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Re: motorbike ignition fault

Post by Robski »

Fat Freddy wrote:I think the same.

First kick on the Primary and nothing on the secondary.

FF
Is it not correct that everything after the EMF kick (spark line) in the primary is a feedback of the secondary ? so why don't they match then if the secondary is shorting to ground(picture in previous post) (picture below of 1&4 which i agree looks like short to ground) ?
Bandit.JPG
OP can you verify if you were coupled to the correct side of the coil secondary (+/-) as you don't seem to have changed probes & there is a strange sub zero voltage going on ?

tiggerbiker
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Re: motorbike ignition fault

Post by tiggerbiker »

Bandit.JPG
OP can you verify if you were coupled to the correct side of the coil secondary (+/-) as you don't seem to have changed probes & there is a strange sub zero voltage going on ?
hi, yes i have connected to the correct feed.
-->
Robski wrote:
Fat Freddy wrote:I think the same.

First kick on the Primary and nothing on the secondary.

FF
Is it not correct that everything after the EMF kick (spark line) in the primary is a feedback of the secondary ? so why don't they match then if the secondary is shorting to ground(picture in previous post) (picture below of 1&4 which i agree looks like short to ground) ?
Bandit.JPG
OP can you verify if you were coupled to the correct side of the coil secondary (+/-) as you don't seem to have changed probes & there is a strange sub zero voltage going on ?
hi, yes i have connected to the correct feed.