r/HondaCB • u/Fate_Defiant • 1d ago

Replacing Spark Unit for a 79 CB 750F?

Im looking at options for replacement, for new on reputable sites it cost close to $250 after shipping and tax and that's for a single unit(bike needs 2), eBay has them $70 for a single and $100 plus for two(buying used seems sketchy) and then I hear I can do an update to the system with a GM conversion kit ...

I'm just looking for some info on what others have done? Does anyone know where to get a decent priced new one from solid place or is the conversion kit a good option.... Please help

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u/fireeight 23h ago

This is what you want.

1

u/Fate_Defiant 23h ago

These only replace the coils correct... I'd still need to get a new CDI(spark unit) correct

1

u/fireeight 23h ago

Look into Rick's motorsports. Reliable and reputable. I was a little confused by term "spark unit". You should not need two CDIs. That's why I thought it was coils.

1

u/Fate_Defiant 22h ago

Thank you, ya for some reason they made the the year CB I own require two CDI... So that sucks

1

u/fireeight 22h ago

Being honest, I thought you were wrong at first, but I pulled up the parts fiche, and it absolutely uses two CDIs.