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Old 07-20-2009, 07:22 PM   #1 (permalink)
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1985 spark problem

i tested my coil an cleaned my points. but i only have spark wen i switch the on/off switch real fast wen i kick it?? its a nice blue spark but only works wen i flip that switch back an fourth fast any ideas??
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Old 07-20-2009, 07:33 PM   #2 (permalink)
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Re: 1985 spark problem

Try unplugging the on/off switch and then kick it over to see if you get spark.
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Old 07-20-2009, 07:33 PM   #3 (permalink)
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Re: 1985 spark problem

an its a z50
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Old 07-20-2009, 07:35 PM   #4 (permalink)
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Re: 1985 spark problem

nope tried it no spark
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Old 07-20-2009, 07:40 PM   #5 (permalink)
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Re: 1985 spark problem

check the ground for the coil, it sounds like a loose connection somewhere in the wiring.
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Old 07-20-2009, 07:41 PM   #6 (permalink)
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Re: 1985 spark problem

The single wire from the stator has a dual receptacle plug, one wire from the coil is plugged in there, and the one wire from the on/off switch plugs into there also, corrrect?
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Old 07-20-2009, 08:46 PM   #7 (permalink)
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Re: 1985 spark problem

yes correct. theres just a positive wire for the coil no ground
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Old 07-20-2009, 08:46 PM   #8 (permalink)
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Re: 1985 spark problem

then theres the ground from the on/off on the frame
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Old 07-21-2009, 06:40 AM   #9 (permalink)
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Re: 1985 spark problem

Try connecting a test light clip to a good ground on the frame, stick the probe into the plug coming from the stator, remove the spark plug, and kick the bike over to see if you're getting spark from the stator itself, possibly the stator is going bad, or your points setting may be off a little(?)
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Old 07-21-2009, 10:45 AM   #10 (permalink)
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Re: 1985 spark problem

the light is bright wen i do that i already tried. an how exactly do you set the gap ill try that again
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Old 07-21-2009, 10:50 AM   #11 (permalink)
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Re: 1985 spark problem

If you're getting a nice fat blue spark, then your points are adjusted correctly, I would now suspect it is between the coil wire plug and the spark plug boot. Try unthreading the plug boot from the coil wire, make sure you have plenty of inner plug wire exposed to contact the plug boot, and/or replace it with a new plug boot. If you plug the coil wire back in, then try the test light on the coil wire end before reinstalling the plug boot, kick the bike over, and see what you get.
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Old 07-21-2009, 11:42 AM   #12 (permalink)
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Re: 1985 spark problem

ya i do get a nice blue spark but its only when i flick the on/off switch. an ok ill try that
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Old 07-21-2009, 02:39 PM   #13 (permalink)
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Re: 1985 spark problem

put test light on an stuck it in the plug wire. it didnt light up at all even wen i flicked the on/off switch
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Old 07-21-2009, 03:09 PM   #14 (permalink)
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Re: 1985 spark problem

Does your on/off switch feel like it's got nice crisp "stops" in each correct position? This flicking it on and off business makes me wonder if one or more of the internal contacts are coming adrift, but if that were the case I think it would feel sloppy when you turn it, and you'd be needing a new switch.

You might try unbolting the two halves and shooting some electronics spray cleaner up inside and switching it on and off; maybe the contacts are just corroded and/or dirty...? The electronics cleaner has worked for me before.

I agree with dirtbkr188 that if you have a fat blue spark some of the time, it would indicate that the problem's not in the points adjustment, but just for future reference, the quick-and-dirty method is to rotate the flywheel until, through the flywheel holes, you can see that the points are as wide open as they get. This gap should be .012-.016"; if it isn't, loosen the adjustment screw just enough to move the points to the correct gap but leave it tight enough to provide a little friction so you don't lose your setting. Once you retighten, check the gap again, and shoot some more spray cleaner in there and maybe even wipe a business card between the contacts to make sure they're clean.
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Old 07-21-2009, 03:29 PM   #15 (permalink)
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Re: 1985 spark problem

i took that switch apart an cleaned it. seems to be fine an clicks good. any way to bypass the switch? or just not run it
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Old 07-21-2009, 04:27 PM   #16 (permalink)
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Re: 1985 spark problem

tried just about everything. starting to aggravate me i cant get this thing to spark no mater wat i do unless i flip the switch back an fourth. but the on/off switch only kills the bike right? how would it prevent it from starting? all it does is ground it out
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Old 07-21-2009, 07:00 PM   #17 (permalink)
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Re: 1985 spark problem

eliminated the kill switch an just had the wire comin out the motor connecting to the coil wire. only way i could get spark is if i tapped the 2 wires together quickly. anybody have any idea what the problem is???
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