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  #1  
Old 12-07-2011, 07:11 PM
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Default Cbr 600 f1 no spark!

Hi all,

I've been having a problem with bike since few weeks- it was cutting off suddenly occasionally but still ran, until few days since when it just doesn't start

There is no spark to any of the plugs. I checked by putting a screw driver in the leads(as it is a pain to remove the plugs) and position it very close to the engine while cranking and no sign of spark at all...
I used the manual to do some ignition checks:

I measured the voltage on the CDI 6P(to ensure no faulty switch on the loom) connector and resistance of the ignition primary coil and all of this is normal.

I get a resistance of 3.4 ohms at the primary coil terminals and 14kohms at the secondary coil terminals.

I also checked the resistance of the pulse generator and getting a 540ohms between the wires and 0hms between any of the terminals and the ground which according to the manual is fine.

Everything is leading towards a faulty CDI... Any other suggestions will be appreciated.

I read somewhere before that a fault fuel pump relay could "simulate" fault CDI somehow- didn't make any sense to me but dunno - can anyone think of something?

Also someone else mentioned about a diode in the ignition switch fault - any explanation about this as well?

Please recommend something, as I really hope to not have to buy a new expensive CDI?

Thanks,

Jay
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  #2  
Old 12-08-2011, 06:04 PM
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Engine kill switch?
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  #3  
Old 12-08-2011, 10:54 PM
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Quote:
Originally Posted by thrasher572 View Post
Engine kill switch?
x2 the first place to start is take the kill switch apart, clean it, and apply electrical contact grease into it. Its a bad place for corrosion.
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Old 12-09-2011, 03:59 AM
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This was the very first thing I checked, and the fact that I am getting 12+V on the 6P connector on the CDI is saying that there is no faulty switch on the circuit. Only to be 101% sure I bypassed the switch but same story... I am waiting for another test piece CDI in the following few days so fingers crossed I finally find what the problem is.

Well.. I was hoping it would be a samller (cheaper) problem than the CDI but if it turns out to be this at least I know whats wrong..

Any other suggestions are very welcome and appreciated!

Cheers
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  #5  
Old 12-09-2011, 07:39 AM
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The kill switch is fine. I did bypassed it just in case anyway..

I am just wandering which one would it be:

Pulse genetrator sensor or CDI...???

Is it supposed to have oil inside the left engine cover (where the pulse sensor is)?
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  #6  
Old 12-10-2011, 08:00 PM
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yes theres supposed to be oil in that cover I believe.

wha year is your CBR? I'll be partng out my 90 soon.
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Old 12-11-2011, 04:32 PM
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Quote:
Originally Posted by sz00 View Post
The kill switch is fine. I did bypassed it just in case anyway..

I am just wandering which one would it be:

Pulse genetrator sensor or CDI...???

Is it supposed to have oil inside the left engine cover (where the pulse sensor is)?
Yes there should be oil in there, when I changed to the +6 Degree Ignition rotor, about a litre came out.
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  #8  
Old 12-11-2011, 05:46 PM
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Ok thanks for the info guys!

Just to update: the bike is now ALIVE- it was the CDI unit. It did fire as soon as I pressed the start button after replacing the unit.

Thanks for the answers!
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Old 12-11-2011, 05:46 PM
 
 
 
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Tags
600, cbr, cbr600f1, cdi, coil, connection, f1, front, headlight, ignition, primary, removal, replace, spark, warm


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