SOHC.co.uk Forums > CB350/400
Spark plugs etc
Oddjob:
The Green Spark Plug company Dave. I buy them by the box full.
The official one for the 500 is X22ES-U (400 is X24 IIRC) but I believe X24 may be a better plug due to todays fuels. Can't say for sure as I haven't fitted any yet until the bikes on the road, hopefully later this year or early next year.
Matt_Harrington:
Cheers Ken, the Denso one for a 400/4 is X24ESR-U - which is, as you say, supplied by Green Spark Plug.
This was an interesting site I came across: https://www.sparkplug-crossreference.com/convert/NGK_PN/DR8ES-L
Johnny4428:
Hi Matt, you probably know but that is resistor plugs as well.
Matt_Harrington:
--- Quote from: Johnny4428 on May 07, 2023, 10:08:37 AM ---Hi Matt, you probably know but that is resistor plugs as well.
--- End quote ---
Yes, but as I have a massive spark with either plug, I'm not unduly concerned. (It's also the one listed in my parts book and incidentally, all the plug caps are listed as 'noise suppressor' ones - so I assume they are also resistor ones ?!) Hey ho!
Oddjob:
They list resistor plugs in the parts book because the original plug caps weren't resisted. Fit resistor caps and you should really drop the resistor plugs.
It's why the OE caps had metal shrouds around them, this was to stop interference with old 425/625 lines on the TV screen.
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