goldy
New Member
Posts: 18
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Post by goldy on Oct 8, 2011 17:02:50 GMT -5
I got the bike and the harness had been cut up some. i sent an afternoon soldering ner fuses to where the old box was. now i've got power everywhere. I'm getting power to the coils but no spark at the plugs. there are two connections where the starter solind was. one is two wires going into one plug. both are red with white stripe and are switched power. then the other is the blue with white stripe. I'm running out of ideas. need some help here
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Post by rebelron on Oct 8, 2011 22:07:24 GMT -5
Buy a new harness from Mike's. A repaired harness is just a breakdown waiting to happen. I know you have an immediate problem now but a new harness will prevent endless hours of frustration. Spend the money.
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Post by rikroc on Oct 9, 2011 8:06:20 GMT -5
If you buy a harness from Mikes for an '81 be advised that they had issues with that year. I and several others have had to repair our new harnesses. Huge hassle. Other years OK...
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goldy
New Member
Posts: 18
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Post by goldy on Oct 9, 2011 15:48:23 GMT -5
I plan to get a new one after i get this thing running. But for now so i can troubleshoot the system i need to keep the one i have. I think i found the problem. I measured the resistance of the coils. The primary was around .1, the seconadry was about right at 8.5. this reading was the same on both coils.
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goldy
New Member
Posts: 18
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Post by goldy on Oct 13, 2011 16:43:35 GMT -5
ok, i replaced the coils, and condenser and still nothing, not even a pop out of this thing. I'm flat out of ideas on what it could be now. I really could use some ideas here on what to check and what to do next.  Oh its a 79 to. |
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Post by grizld1 on Oct 14, 2011 9:33:29 GMT -5
Goldy, if you have power to a pair of good coils but no spark at the plugs, the grief may be at the points or at the condenser ground.
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Post by tomterrific on Oct 14, 2011 10:32:22 GMT -5
Goldy,
Points are the simplest to diagnose once you know how they work.
power goes to the coil (+). you can get this from teh battery with a jumper if needed.
The points are intermittent ground. They close and charge the coil. They open and the coil fires the plug.
That's it! That is the way points work. Add in a capacitor in parallel with the points to keep the points from acrcing so they last longer. The spark plug wires and cap need to be unbroken so the spark gets through. The plugs can't be fouled or the spark goes through the fouling instead of jumping the gap. This is all the points you need to know to fix almost anything points.
Tom
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goldy
New Member
Posts: 18
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Post by goldy on Oct 14, 2011 16:44:50 GMT -5
I'll try the jumper from the battery to the red/white cable tommorow and see what happens. What would be the next step or part to test if I still get nothing?
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goldy
New Member
Posts: 18
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Post by goldy on Oct 14, 2011 18:07:28 GMT -5
ok, well, I tried the jumper and got nothing. I'm getting pretty frustrated with this thing. would the rectifier,regulater, or saftey relay have any say if i got a spark? would a whole new ignition (pamco) help? i just dont want to keep throwing money at it for no return (pop, start something). Any other ideas??
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Post by speez on Oct 14, 2011 19:25:55 GMT -5
try putting a jumper to neg. side of coil and flash (pulse) the neg of battery, if you get a spark theirs something wrong with your trigger system, points or condensers also wiring
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Post by tomterrific on Oct 15, 2011 11:34:01 GMT -5
Did you understan what I originally wrote? If you have +12v to teh coils, do you have intermittant ground to teh coils? The points are ground (-). Gap teh points on teh nose of teh point cam. The points close and charge the coil. The cam turns and opens the points, that is when the plug fires.
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goldy
New Member
Posts: 18
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Post by goldy on Oct 20, 2011 16:43:52 GMT -5
I understand. I'll test both aspects tommorow when i get home. its been raining the past couple days so i cant get out there and work on it like i want. is there anything else i could try if i do have the ground is intermitant, and i cant get it to spark by pulsing it to the battery? I'm using a small plug in charger to ensure the battery is up to par even though its new.
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Post by speez on Oct 21, 2011 7:33:58 GMT -5
ok, just wondering not to insult no 1 but when your checking 4 spark are you grounding the sparkplug, to check for spark?for thecoil, put (+) to batt. direct to batt and (-) pulse the ground you should get a spark! if not the coil/s are shot
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goldy
New Member
Posts: 18
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Post by goldy on Oct 21, 2011 15:29:51 GMT -5
I used the head to ground the plug and didnt get a spark at all. Then I got the idea to try with out the sprkplug cap and see how it did. I got a good spark fron just the wire. I'll replace the caps and wires. I tested the points to see about the intermitant greound it wasnt, it was a constant ground even when they were open. I must have done something wrong when installing the new points. What can i do now?
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goldy
New Member
Posts: 18
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Post by goldy on Oct 23, 2011 16:44:17 GMT -5
I did some more testing today and found the coils are the constant ground. I'll testy again woth the battery installed and see what comes out.
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Oh its a 79 to. 
