Question about 1979 Harley Davidson XLS 1000

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Were points are located and how to change points on 1974 harley s

New coil and still no fire to plugs

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1979 Sportsters were electronic no points unless they were changed during the life of the bike.
If it is points they are located on the right side of the motor under the little round plate.Points set @ .018 with the piston a TDC.Either use a screw driver in the plug hole or take the timing plug out and set the flywheel mark ( the line or the dot)inthe center of the hole.Set points.If you cant find the marks or the hole take it to a shop

Posted on Dec 27, 2008

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Hi! Not knowing what year your H.D. is? and also not knowing whether electronic ignition or Points? Have you taken a look behind the aluminium round plate With Harley Davidson or H.D. on it usually located on the right side of the engine (as you sit on the bike) By the base if the front Cylinder.
If points check/adjust gap, if Electronic? ignition module may need replacing.
Failing all this try new plugs and leads?
Good Luck! I hope this sorts your problem? if so press FixYa blue button.
Merry Christmas!
Paul 'W'

Posted on Dec 18, 2008

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1974 1000 sporty, front cyl doesn't fire

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1974 ironhead, ran fine untill today, now its only firing on cylender one. I changed the plugs, wires ect.. still has same issue, BUT, if i pull number two wire off and let it hang on to the plug bairly,...

The first thing I'd do is check the points. I'm sure whoever built the engine or did the restoration replaced the points. When a set of points are installed, the breaker block, that piece of fiber that rubs on the breaker cam that opens and closes the points, wear rapidly to begin with. Check the points and set them at 0.018". The timing should once again to back to the proper setting once the points are correctly set. Then, test the primary resistance of the coil. Take the wires off the small terminals on the coil. Using a digital volt ohm meter set the meter's function selector switch to OHMS in the R X 1 scale. Put the red lead to one of the coils connectors and the black lead to the other. Your meter should read between 5 and 6 ohms for use with points. Now, if your bike has been converted to an electronic igntion, the coil's primary resistance should be between 2 and 3 ohms. To check the secondary of the coil, put the meter's selector switch to OHMS, in the R X 1K scale. Put one lead into each coil tower. The meter should read about 16.0 K to 20.0 K.

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Sep 22, 2011 | 2001 Harley Davidson XL Sportster 883...

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Check for the correct dwell on your points and for any vacuum leaks. Also, check the resistance on your plug wires, replace if needed.
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I have a 1974 harley I can't get it to fire. One port on the coil (bottom) has real slight fire. The top nothing? fxt lowrider

Test the primary side of the coil. Disconnect the small wires from both ends of the coil. Then, use a digital volt ohm meter to test the resistance of the coil. Put the meter's function switch in OHMS, R X 1 scale. Touch one meter probe to each one of the terminals on the ends of the coil. The meter should read between 5-6 ohms of resistance. If it does this, reconnect the white wire to the top terminal of the coil. Take a plain piece of wire and strip about an inch of insulation from each end. Connect one end of this wire to the bottom terminal of the coil. Put both spark plug wires in the coil with a spark plug in each wire. Make sure the plugs are grounded to the engine. Turn the ignition switch on and MOMENTARILY touch the wire you connected to the bottom terminal of the coil to the engine and then take it away from the engine. When you take the wire away from the engine ground, you should see a spark at both plugs. If not, the coil is bad. Have you cleaned and checked the gap on your points? Clean the points using a thin piece of stiff paper like a piece of index card with a bit of alcohol on it. Set the gap on the points to 0.020". Make sure the gray wire from the points is connected to the bottom terminal of the coil.

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Aug 02, 2011 | Harley Davidson FXST Softail Standard...

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Fisrt check the plug and plug cap. Remove this and see if you have spark from the HT wire.
Check points are clean and points gap and make sure the wire is not shorted out and you have spark there.
If not, remove the HT coil wire and condensor wire and check for spark at the points again.
If you have spark then the bottom coil is ok and then connect the condensor wire and check again.
Connect the HT coil wire after checking no shorts and if you have spark at the points and still none at the HT side then your coil is probably faulty.

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I have power coming to the coil, pints but no spark. There is a new battery and coil in it so I`m stuck, please help

Try a new spark plug cap and for that matter a new plug(wet fouling is common with ethanol fuel) should only cost about $5-$10. I have seen people reinstall points 3 or 4 times before they were able to get spark. make sure the points are installed correctly and not grounding out.

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