Question about 2005 Harley Davidson FLHRSI Road King Custom

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I have a 1975 Harley SX 250 with a very intermittent spark.

I have a 1975 Harley Davidson SX 250. I am getting a very intermittent spark. I have checked the ignition system and wiring harness and kill switch. I checked the stator, ignition switch, ignition coil and pick up coil with a voltmeter. The only thing that was not up to spec according to the manual was the pick up coil. The resistance between the pick up body and the metal contact tab that accepts the green wire was 65 ohms versus 120 ohms as per the manual. Would this cause the spark problem. Any help would be appreciated

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  • Contributor
  • 7 Answers

If your points are sparking as it is running, replace your condenser. I would do that first anyway. You can put any condenser in it., A condenser is a condenser. Make sure your new plugs, points and condenser are all operating correctly. You have probably already done all that but it is all I can think of.

Posted on Apr 03, 2014

Testimonial: "The ignition system does not contain points or a condensor. It is a hybrid electronic ignition with a magneto which includes a magnetic rotor and stator and a magnetic pick up coil that as the magnetic rotor turns the magnetic pick up senses a change in the magnetic field and sends a signal to the ignition coil which develops the spark"

  • bobodavis Apr 05, 2014

    Like a lawnmower. I got ya.

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6ya6ya
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Posted on Jan 02, 2017

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wd4ity
  • 4565 Answers

SOURCE: 1999 police harley davidson rewired bike with new harnmess power

If you have power going to the coil but no spark, you've got something wrong with the "triggering" circuit of you ignition system.

One other thing, if your engine is the TC88 engine, (first year of production for some models) it probably has a "compression sensor" on it. If you have no compression, you will not have any spark. If you have your plugs out of the engine, you have no compression. So, screw a set of plugs into the engine, leave another set in the wires and grounded against the engine to test the spark.

The "triggering system" uses the signal from the ignition timing sensor that is located in the "nose cone" of the engine. Check this wiring from the ignition unit's "Black box" to the sensor. I seem to remember a plug that plugs in for this unit.

I'm afraid that this is about the only help I can give you with a stock ignition unit as I usually work with either earlier igniton systems or aftermarket units. I have very little experience with "stock" Harley units.

Posted on Dec 20, 2009

  • 3 Answers

SOURCE: I have a 2005 Harley Davidson engine in a custom

I would check the coil first and see if it needs replaced .If it's new and you still have reciept ,take and get a replacement coil for the one you bought and make sure your wires coming out of everything have power be tracing the system to see if there might be something shorting.

Posted on Apr 27, 2009

wd4ity
  • 4565 Answers

SOURCE: Restoring and need to find

This bike is NOT a reversed ground. It's a standard 12 volt negative ground system. If you need a wiring harness, there are very few places that carry the parts for those bikes. Matter of fact, there isn't but about four. For your wiring harness try http://www.motomacchi.com/ There is also a very helpful Yahoo Group that specializes in those little bikes. http://autos.groups.yahoo.com/group/Aermacchi/

Most Harley dealers and most Harley sites don't even recognize these little bikes as Harleys. They are the "red headed step children" of the H-D bikes. If you need to know anything about these bikes, contact me directly at wd4ity@bellsouth.net

Good Luck
Steve

Posted on Sep 01, 2010

wd4ity
  • 4565 Answers

SOURCE: need wiring diagram 1975 harley

Go to this site and join this Yahoo Group. They can tell you where to get a schematic and help with almost any other information you might need. http://autos.groups.yahoo.com/group/Aermacchi/

Good Luck
Steve

Posted on Jun 12, 2011

wd4ity
  • 4565 Answers

SOURCE: i have a 1984 harley

I can send you a complete wiring diagram for your Sportster. The wires you are talking about go to the stock igniton unit, the "brain box" or "black box" that is behind the triangular plate on the right side of the bike as best as I can remember (1984 was a long time ago). There should be two white wires on the coil and one is the "hot" wire and the other goes to the ignition unit. The pink wire goes to the tachometer. The blue wire goes to the opposite side of the coil from the white wire, same side as the pink wire. The black wire is a ground wire for the igntion unit most likely. But, I'm confused by you saying the wires go to a "sensor". The only sensor on the bike is in the timer cavity on the right side of the engine and the wires coming from it are different color from what you mention. Are you sure it's not simply a plug? Contact me directly at wd4ity@bellsouth.net and I'll send you the diagram. Remind me of what you need.

Steve

Posted on Jul 25, 2011

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