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terminal velocity
90cc 2 stroke / 110 4 stroke
Joined: 09 Jul 2006
Posts: 63
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 Posted: Fri Feb 08, 2013 8:40 pm Post subject: No spark on old 2 wheel motocrosser |
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Hi all,
Just wondering if anyone can shed some light on my problem.
I've got an 1986 YZ250 here and it's got a bit of a spark problem. As I bought it the wires had been cut from their connectors and left. It was supposed to have a bad coil.
Now, I have got another (secondhand) coil for it today and i'm a little bit stumped.
There appear to be 4 wires that come from the stator on the bike (brown, red, white and white with a green stripe).
On the end of the CDI that connects to the stator are only 3 wires (black, brown and white with red stripe).
On the end of the CDI that connects to the coil there are 3 wires (black, black and orange). The orange is to the coil I am sure and I assume the other two black are to the kill switch?
If I put a 12 volt test light on just the brown and red from the stator and turn the bike over I get a pulse/flash. So i'm assuming the stator is Ok?
Is there any way I can test if the coil and CDI are Ok?
Any help is appreciated, Cheers! |
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Sponsor
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terminal velocity
90cc 2 stroke / 110 4 stroke
Joined: 09 Jul 2006
Posts: 63
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| Posted: Sat Feb 09, 2013 11:21 pm Post subject: |
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Got some help from a bike mechanic who did his apprenticeship with Yamaha in the 80's.. Turns out my CDI is two years newer than the bike and they will not work together. Solution: Get a 1986 model CDI
Cheers all |
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kartl
50cc nipper
Joined: 21 Feb 2013
Posts: 3
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| Posted: Thu Feb 21, 2013 12:16 pm Post subject: |
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| Question what was the reason for the cdi to be busted? |
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terminal velocity
90cc 2 stroke / 110 4 stroke
Joined: 09 Jul 2006
Posts: 63
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| Posted: Mon Mar 04, 2013 11:01 pm Post subject: |
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The CDI was not mating up to the stator properly and there was no output current to the coil.
As I purchased the bike it came with what turned out to be an 1988 model CDI.
Whereas, the bike (and stator) are 1986 models. |
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