'73 AT3 - no spark

[nilzor]

Hi,

I have a problem with my AT3...

I tested the spark plug to see if it gives off a spark. I also took off the connector but no luck here as well.

The next thing I guess is to thest the coil. How do I do that? Do I need to yake it off the bike? the Cables seem to be soldere on...

Thanks for any advice,

Nilzor

[flyday58]

Did you try another spark plug to verify no spark?

[nilzor]

yes, i also held the end coming from the coil against the engine to see if there's a spark there

[skik]

if you can get a similar coil off another running bike and try that for spark or yours on another bike.

[Airhead]

you can check the resistances of the ignition coil and the field coil, the figures are in the parts book

PM sent

[blackhat250]

Take the Mag cover off " see if points are sparking, [ kick over in dark area ,]

[nilzor]

Thanks all,

By now the battery completely drained. Would that have an impact on the ignition?

@blackhat250

What do you mean with Mag cover, like the flywheel?

[skik]

check engine is earthed to frame ok and all earth points

[nilzor]

is there a chance that it doesnt work without the original key? I can put another key in and change the position of the ignition. However the key is kinda loose in there...

[blackhat250]

As long as the ignition is on, you can disconect the black/white wire to iggy switch & handlebar stop , this should give you spark, ,