Motorcycle Questions? Ask a Mechanic.
Did you clean out the tank and the carb, and put fresh gas in it?
After sitting, the needle jets in the carb will be clogged up with varnish.
When gas sits, it evaporates, leaving behind a varnish that is hard to dissolve. Modern gas, within the past few years, can start going bad within a month. Since the carburetor has a bowl that fills with fuel in order to operate, when that fuel evaporates it will gum of the tiny holes in the needle jets. You need to disassemble the carb and let it soak in a container of solvent for a day or two, then use compressed air to blow out the passages to make sure they are clear, and spray solvent through the needle jets to make sure they can flow.
Perfect, hope you get it running!
That's OK- the system will send you automated messages to come back, just know it is not ME harassing you. If you have further questions don't hesitate to ask.
What do you mean by random? Meaning it is not always there, or it sparks at the wrong time?
Does it have a cutoff switch (kill switch)? Is that what you are checking on the handlebars?
Is the battery cranking the engine? Or are you kick starting it? Have you tried a little starting fluid in the carb throat? Make sure the air filter and all vacuum lines are hooked up or it will not start, too much air intake.
Have you checked the stator windings to see if they are broken or corroded? That is what builds the field to initiate spark.
OK- so the CDI (which I assume is the box your husband replaced)- does it have 4 pins or 5 pins at the connector?
Your stator is under the cover, it is the windings that generate the spark pulse as the engine rotates.