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CB77 Coil test values

Points Based Ignition | Electronic Ignition Upgrade
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Idler
honda305.com Member
Posts: 3
Joined: Tue Feb 14, 2012 5:47 pm
Location: UK

CB77 Coil test values

Post by Idler » Wed Apr 04, 2018 5:00 am

Can anyone advise on the specified readings for testing my CB77 ignition coils. On mine

The primary circuit readings are 3.5 and 3.8 ohms

and secondary circuit readings are 8500 and 8600 ohms

I have it in my head that the primary readings should be around 1.4 to 1.8

DJM
honda305.com Member
Posts: 553
Joined: Thu Oct 09, 2003 1:54 pm
Location: Chesterfield UK

Coil values

Post by DJM » Wed Apr 04, 2018 11:52 am

Without looking them up I'd say they sound OK.

Typically coil ignition primary values are between 2.5 and 5 Ohms

ET (Energy transfer) or 'magneto' system primaries are usually are 1 ohm or less

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