Motorcycle

Does a motorcycle alternator run the spark plugs or does it run off the battery?

I’m having some prolem with my spark being weak (it’s not the coils, plugs or wires), this happans after riding for 5 minutes of riding, as it runs fine when it starts up. Could the alternator not be putting enough voltage out to run the plugs and it doesn’t use the battery (as the battery has plenty of juice when the bike dies).

It’s just like a cars electrical system. If the thing starts and runs and the battery is still charged then it’s not the battery or altinator. What year bike? Yoour coils could be failing and not show it when cold. Or your ignition module coould be doing the same thing. What makes you say that the spark is weak? I would tryo to check things as soon as it cuts out.

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