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

Correct plugs for CA77

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casamere
honda305.com Member
Posts: 379
Joined: Tue Nov 04, 2014 4:47 pm
Location: yorkshire UK

Correct plugs for CA77

Post by casamere » Wed Nov 28, 2018 2:18 pm

I have always fitted D8HA plugs and never had a problem but is there an alternative that people have tried. I know the answer will be stay with what you are happy with but just asking.
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DJM
honda305.com Member
Posts: 553
Joined: Thu Oct 09, 2003 1:54 pm
Location: Chesterfield UK

CA plugs

Post by DJM » Wed Nov 28, 2018 2:41 pm

The 1963 Owners Manual quotes C7HW as being the correct plug. This is a 10mm plug and the equivalent would have been a D7HW.

Modern plugs have a wider heat range than the 1960s issue so my guess is that the heat range of the D8HA or a D8HS would overlap that of the D7HW anyway.

If it works OK don't change it.
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