Honda-SOHC

SOHC.co.uk Forums => CB350/400 => Topic started by: Ken4004 on April 08, 2026, 04:47:00 PM

Title: Spark plug question
Post by: Ken4004 on April 08, 2026, 04:47:00 PM

Hi Everyone just a quick question about spark plugs on the 400 4 , in the Haines manual it calls for DR8ESL plugs I have DR8ES plugs does anyone know the difference ?

Title: Re: Spark plug question
Post by: Bryanj on April 08, 2026, 05:01:39 PM

Half a heat grade, they will be fine unless you are a nutter!

Title: Re: Spark plug question
Post by: Ken4004 on April 08, 2026, 07:05:09 PM

Ok thanks for the info

Title: Re: Spark plug question
Post by: exvalvesetdabbler on April 08, 2026, 08:41:09 PM

I thought it should be D8EA or denso x24es

Dave

Title: Re: Spark plug question
Post by: exvalvesetdabbler on April 08, 2026, 09:35:53 PM

Also if you're running resistor plug caps you don't really want a resistor plug as well.