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ignition coils?

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bob fell
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ignition coils?

#1 PostAuthor: bob fell » Mon Sep 24, 2012 10:03 am

Hi

took my bike out at the weekend,first time in a few weeks and it was running really bad like on 3 cylinders, I checked the spark at the plugs and just seem to be getting an intermittent or no spark, does this mean its the coils? I will take the tank off at the weekend and check the connections etc. It has electronic ignition on it, if I renew the coils would it be a good idea to buy Dyna S ?

any advice appreciated

Bob

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andyb1962
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#2 PostAuthor: andyb1962 » Mon Sep 24, 2012 10:35 am

Dyna S are the way to go for reliability. but check everything else first. Voltage to coils resistance across coils. there are a couple of good threads in here all bout coils. read up first and do some basic checks before you invest.
good luck. :wink:
Andy :wink:


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KeithZ1R
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#3 PostAuthor: KeithZ1R » Mon Sep 24, 2012 1:15 pm

change the plugs first a duff coil would show on one pair of plugs where as a plug with high resitance or an internal short through the insulator will spark intermittant just a thought :|
Keith
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Pigford
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#4 PostAuthor: Pigford » Mon Sep 24, 2012 5:26 pm

...and.... check HT leads - run bike in dark to see if "arcing".....

...check that a good +12v is getting to coils...... common problem :wink:
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bob fell
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#5 PostAuthor: bob fell » Wed Sep 26, 2012 8:46 am

I only seemed to be getting a faint intermittent spark on cylinder 3 spark plug

will check more at the weekend when I have time , how do I check the coils ?

thanks for replies

Bob

gray
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#6 PostAuthor: gray » Sun Sep 30, 2012 7:28 pm

I guess you need a multimeter , you should set it to resistance/ ohms,
then attach the probes to the low tension ( thin ) wires- any way round - should get low resistance
then put the probes into the 2 plug caps at the end of the HT leads- once again low resistance.
There should be infinite resistance between any thin wire and any HTlead/ plug cap
(i think)
gray

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#7 PostAuthor: PAULJAC47 » Mon Oct 01, 2012 4:32 pm

Swap coils over and see if fault moves!
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KeithZ1R
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#8 PostAuthor: KeithZ1R » Mon Oct 01, 2012 8:28 pm

or swap the plug about and see if it follows
Keith

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You can never have too many tools in your life, except the two legged variety



I'm never wrong, once I thought I was but I was

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bob fell
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Location: CHESHIRE

#9 PostAuthor: bob fell » Thu Oct 11, 2012 8:06 pm

thanks for the replies

I went to the bike at the weekendand it started and is running perfectly. I think the problem could have been the key in the ignition switch...since I have had the bike (14 years)whenever I have started it I take the key out or it falls out as I think in its colorful history the switch has been forced probably an attempt at theft. once or twice in the past the bike has cut out while I have been riding it but when I`ve put the key back in and wiggled it the ignition light has come back on, anyway I have ordered a new one and will see what happens, so possibly this could solve it I will let you know

Bob


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