1968 Atlas need battery?

KC_Mike

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I'm in the process of reviving a 1968 Atlas and see that it has a magneto. This bike currently has no spark. Does it need a battery to create spark when the engine is kick started?
 
A 1968 Atlas would have started life with points ignition which is mounted in the same position as the magneto, or has sombody fitted a magneto to it?
 
A 1968 Atlas would have started life with points ignition which is mounted in the same position as the magneto, or has sombody fitted a magneto to it?
Maybe they did. There's no ignition switch, just a 3-way switch that someone has wired to ground in the left and right positions, center is ungrounded. I'll post a picture of it soon and maybe you can tell me for sure if it's a magneto or distributer.
 
IF its Magneto the spark plug wires will be attached to each side of the magneto, otherwise there will be a pair of coils probably mounted to the back of the battery box.
 
Maybe they did. There's no ignition switch, just a 3-way switch that someone has wired to ground in the left and right positions, center is ungrounded. I'll post a picture of it soon and maybe you can tell me for sure if it's a magneto or distributer.
If it's a Lucas mag it'll generally spark once you've cleaned the points even if the condenser has gone
Make sure the cut out wire isn't shorting somewhere
Best way to ensure this is to try it with the end cap removed
Some photos would help here
 
If it's a Lucas mag it'll generally spark once you've cleaned the points even if the condenser has gone
Make sure the cut out wire isn't shorting somewhere
Best way to ensure this is to try it with the end cap removed
Some photos would help here
Here are a few pictures. Based on what I'm reading in this thread this is a magneto, correct?

First thing I'm going to try tonight is removing what appears to be the kill wire (the white wire at the bottom of the photo with a blue end on it) and check for spark. Then after that I'll pull the end cap.
 

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A 1968 Atlas would have started life with points ignition which is mounted in the same position as the magneto, or has sombody fitted a magneto to it?
Unfortunately I have no history on this motorcycle at all. A friend bought it as-is and asked me to get it running and see what it would take to make it road worthy. I've been working on bikes for a long time however this is my first Norton.
 
If it's a Lucas mag it'll generally spark once you've cleaned the points even if the condenser has gone
Make sure the cut out wire isn't shorting somewhere
Best way to ensure this is to try it with the end cap removed
Some photos would help here
I'll give it a try.
 
Well I'd say it's definitely a magneto after looking around a bit. I pulled the kill wire completely off and still no spark. I then pulled the center cap off and the point surfaces don't too bad, I've yet to check the gap but I see that it does have one. Pulled and ohmed both plug wires and the brush was stuck up in the holder on one and the other appears to have a break in it when I bend it a certain way. I freed up the brush and still no spark.

Someone has been working on this issue it appears. The kill looks like it's been replaced, it was loose where it attacches to the mag and both spark plugs were only finger tight. With the weay the brush was stuck up in the holder is it time to p[ull this magneto and have it tested/rebuilt?
 
The central screw that holds the points plate onto the end of the armature should have electrical continuity to the casing with negligible resistance, when points are open or shut.

If it doesn’t, there may be a problem with the earth brush or its teack. That brush is under the big screw head beside the label.

Having said that, an old magneto usually needs refurbishment with a new condenser. That’s regarded as a specialist job.
 
The central screw that holds the points plate onto the end of the armature should have electrical continuity to the casing with negligible resistance, when points are open or shut.

If it doesn’t, there may be a problem with the earth brush or its teack. That brush is under the big screw head beside the label.

Having said that, an old magneto usually needs refurbishment with a new condenser. That’s regarded as a specialist job.
I'll check for continuity, thanks. Understood on the refurb being a specialists job.
 
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