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1965 Honda CP77 — Ulsan Metro City, Rep. Korea
Restored with original parts — Owner: J. Doe

Substitute for OEM coil

Points Based Ignition | Electronic Ignition Upgrade
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teazer
honda305.com Member
Posts: 798
Joined: Mon Feb 08, 2010 10:32 pm
Location: Midwest US

Post by teazer » Tue Nov 27, 2012 3:53 pm

That coil is only 2.4 ohms. What'sstock spec on your original? If it's close, then no worries. Most coils for points are around 5 ohms. Lower impedance coils will tend to draw more current that hi impedance coils and will get hotter.


You will probably be OK but better to get a coil from an older SOHC 4.

CB175/160/200 coils should all work too.
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Tinman
honda305.com Member
Posts: 152
Joined: Thu Sep 20, 2012 3:36 pm
Location: Vacaville, California

Post by Tinman » Tue Nov 27, 2012 5:26 pm

Teazer,
My old coil was only pulling 4ohms. I've been riding around a bit with the new coil now and haven't experienced any problems, but that was on short rides. When the weather gets a little nicer and I take it for an extended ride, I'll have to re-check it. Thanks for the reminder.

Tinman
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