Blisterphish
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- Jul 15, 2006
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What exactly is the CDI unit for? :coocoo:
What does the CDI really do?
- Thread starter Blisterphish
- Start date
- Jan 1, 2001
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I read somewhere that it's stands for Capacitor Discharge Ignition and it makes the bike go.
Blisterphish
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- Jul 15, 2006
- 27
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- Thread starter
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- #3
Answers found to the CDI riddle.
Okay folks, since a bunch of people have read this question / post but none have known or wanted to share the answer I did some detective work of my own. I decided to be a giver (of other people’s knowledge :laugh: ) to the forum rather than always a taker. Please give Kudos to the individual authors at the following places.
http://dansmc.com/cdiignition.htm
http://hometown.aol.co.uk/bikesparks/CDI_1.htm
Dave.
Okay folks, since a bunch of people have read this question / post but none have known or wanted to share the answer I did some detective work of my own. I decided to be a giver (of other people’s knowledge :laugh: ) to the forum rather than always a taker. Please give Kudos to the individual authors at the following places.
http://dansmc.com/cdiignition.htm
http://hometown.aol.co.uk/bikesparks/CDI_1.htm
Dave.
- Jan 1, 2001
- 3,043
- 9
Ain't that what I just said? :)Blisterphish said:
elliot-cr133
Uhhh...
- Jul 4, 2006
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well recently i pulled out a bunch of my step dads old dirt rider magazines..and int he December 1986 issue, i don't know if any of you still have the issues. i'm pretty sure that's where i seen a really good definition and thorough description on the cdi box. i'm not sure if the cdi boxes back then are the same we use today.
- Aug 3, 2004
- 1,003
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When the signal to fire is recieved by the CDI from the pick-up coil, the CDI looks at the RPM and(in some cases) the throttle position, and selects the appropriate advance or retard to fire the coil/plug. It tells the coil when to fire the sparkplug.
Blisterphish
Member
- Jul 15, 2006
- 27
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- Thread starter
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- #7
follow up question
Thanks phil,
With your answer in mind I am now wondering what effect changing the position of the stator plate has on timing? Is that something that should just not be done at all? I guess there is no point in moving it if the CDI is doing what it is supposed to do.
******how this question pertains to my situation******
If my bike were to sputter badly until up to temp and start really hard even when warm. If it suddenly quit running all together. If it sounded like the choke is on for the few rare seconds I do manage to get it running (hollow sound).
Which is more likely to have died.....the stator assembly or the CDI?
This is knowing that pretty much everything else has been tested and is known good.
Masterphil said:
Thanks phil,
With your answer in mind I am now wondering what effect changing the position of the stator plate has on timing? Is that something that should just not be done at all? I guess there is no point in moving it if the CDI is doing what it is supposed to do.
******how this question pertains to my situation******
If my bike were to sputter badly until up to temp and start really hard even when warm. If it suddenly quit running all together. If it sounded like the choke is on for the few rare seconds I do manage to get it running (hollow sound).
Which is more likely to have died.....the stator assembly or the CDI?
This is knowing that pretty much everything else has been tested and is known good.