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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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crane, ignition, ironhead, points, single fire

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  #1  
Old 9th April 2016
Kickflippin Kickflippin is offline
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Default Switching back to points from Electronic Single Fire

I had a Crane Hi-4 Single fire fail on my '76 XLCH. I can't afford a new electronic ignition right now but I do have a good points assembly here.

Can I even run points with a single-fire coil?

If so, how would I change the wiring to power the points breaker?

I'm running kick-only, with no tach or VOES so its only the 3 wires from the unit. Thanks!






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  #2  
Old 9th April 2016
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With a single set of points you would have to rewire the coil to dual firing or simply replace the coil with one that is dual fire rated for points
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  #3  
Old 9th April 2016
Kickflippin Kickflippin is offline
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How would i rewire that? Splice one wire to run to both front and rear cylinder posts on the coil?

Thank you
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  #4  
Old 9th April 2016
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ignition systems are based on the ohm`s of the coil. you might be able to link the 2 coils together but the ohm`s may be way off and either degrade the coil output voltage or burn the points from the high current
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  #5  
Old 9th April 2016
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I just did the same thing to the 74 stroker I picked up same ei ...I had a points plate switched back and spliced the wires didn't work well... picked up a cheapo lot off epray and all is well in the world well bike wise atleast...swap ir to points their more work but you can see what their doing and fix em if their not doin it
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  #6  
Old 9th April 2016
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Without opening up the coil, I don't know of a way to wire up a single fire to make it a double fire. Either new coil, or new ignition.
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  #7  
Old 9th April 2016
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Smerch Smerch is offline
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I can't offer any help on switching to points, but since I am running the same HI-4 ignition I'm curious about how it failed.

Did it give you any kind of warning or did it just go belly up one day?
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Old 9th April 2016
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Quote:
Originally Posted by Smerch View Post
Did it give you any kind of warning or did it just go belly up one day?
isn't that how they do? fine one day, then the next - croak!

kick - if you have an indy near you, why not drop in make friends and see if they have a dual fire coil they will trade you?
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  #9  
Old 9th April 2016
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Who ever installed mine for the po snagged the wire cover pretty good fishing it through the cam case eventually it wore through all the way and shorted the whole deal...probably the reason the po parked it in the first place
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  #10  
Old 9th April 2016
jeffro57 jeffro57 is offline
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get dual fire coil, sell old coil on fleabay, rewire of current coil waste of time,
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