82 xj750 seca ran for a couple secs then shut off. did the norm check fuel flow , levels, so on. No problems with the carbs I have since pulled them and fully cleaned them, replaced manifold gaskets, same problem, Checked spark 1 and 4 fire great 2 and 3 fire only as you let go of the starter button if at all. Checked coils, wires, and caps with ohm, no issues. I then checked the pickups both tested the same as normal. so i guess my question is the only way to check the operation of the ignitor to swap it out with a known good one, Could i swap it out for the one my 82 seca 400 without frying that one, Could there be something else I'm overlooking

Hello all .. My first post ..... I have the same problem with my 1982 XJ750 Maxim but 2/3 fire and 1/4 won't when cranking the engine. Once I let go of the starter button, I will get spark on 1/4. Sometimes I get spark on 1/4 when first pushing the start button but then nothing while cranking. Ignitor box?? The bike will not start. Is there anything else to check? I've never seen this problem before on any other bike I've owned. I gotta tell ya ... this site is a great place for info. It's helped me already on my way to restoring a neglected Maxim. (left outside for 12 years but it shows signs of life!)

82 xj750 seca ran for a couple secs then shut off. did the norm check fuel flow , levels, so on. No problems with the carbs I have since pulled them and fully cleaned them, replaced manifold gaskets, same problem, Checked spark 1 and 4 fire great 2 and 3 fire only as you let go of the starter button if at all. Checked coils, wires, and caps with ohm, no issues. I then checked the pickups both tested the same as normal. so i guess my question is the only way to check the operation of the ignitor to swap it out with a known good one, Could i swap it out for the one my 82 seca 400 without frying that one, Could there be something else I'm overlooking

You can test the igniter. Pull the plugs & ground them on the head, pull the igniter connector, identify both pairs of wires & flash 12v to one pair, the plugs will spark. You might have to reverse + & -.