Firing on front cylinder only
Changed sparks, wires and coil

Checked compression yet?

Changed plugs, wires, coil

In your OTHER post... https://www.askmehelpdesk.com/motorcycles/02-harley-davidson-roadking-643612.html You claim it's the rear cylinder that's not working/getting no spark... so which is it anyway? There are only two... make your mind up... or is this a jok post like the other?

In your OTHER post you claim it's the FRONT cylinder isn't getting spark. https://www.askmehelpdesk.com/motorcycles/no-spark-front-cylinder-643629.html

Which is it... there are only TWO.. Or is this a joke post?

Yes they have them in Ohio too... even have Malls and Starbucks surprisingly enough.

Both threads merged

And both threads contradicted each other... because in one the front works but not the back, and the other the back works but not the front...

Combine them it either runs right or it don't run at all, but having BOTH conditions at once is a physical impossibilitiy because it's a TWO cylinder engine.

Waiting for the OP to come back and explain themselves.

Sorry for the confusion. I am sending this for my husband. We are new at this. It is the front cylinder that will not spark. Real dim spark.

Front cylinder not sparking. Replaced plugs wires coil

Ok... another question... you did compare the sparks from the front to the back cylinders.

Weak YELLOW spark? Or is it blue? Are they both alike? Are the spark plug gaps correct?

Does this have the original dual fire ignition or has it ever been converted over to single fire? Easy enough to know because you will have two small wires to a dual fire and either 3 or 4 with a single fire... this is NOT the big much thicker plug wires.

Bike is orignial. Tested with tester and was very weak/dim on tester.
Has 3 wires.

Very weak yellow spark in front cylinder.
Back cylinder is perfect.
Has original ignition.