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Author Topic: Spark Plugs!  (Read 466 times)

Offline Matt_Harrington

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Spark Plugs!
« on: May 27, 2024, 02:19:01 PM »
Does someone know the equivalent Denso plug to replace NGK ones on my 400/4?

I spent hours last weekend chasing a fault only to find it was my complete set of plugs that were faulty. They worked initially on the new engine build and all was good apart from fuel leaks. This led me to believe that the ignition system was OK (How wrong I was!) Carbs sorted and installed and no firing at all. As The carbs had been off I assumed the issue was there.
Anyway, on a whim I replaced the plugs with an old set and the engine purred like a kitten.
I have yet to establish if the plugs are fake but with so many fake ones around, as I have discovered, I thought Denso ones might be an option.
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Matt
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CB400F 1976 -  Almost finished
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Offline McCabe-Thiele (Ted)

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Re: Spark Plugs!
« Reply #1 on: May 27, 2024, 02:26:06 PM »
« Last Edit: May 27, 2024, 02:31:16 PM by McCabe-Thiele (Ted) »
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Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
This is a neat 500 restoration in the USA.
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556

Offline Matt_Harrington

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Re: Spark Plugs!
« Reply #2 on: May 27, 2024, 04:47:23 PM »
Thanks Ted,
Didn't know of that company. There is also a W24EP-U but that has a solid SAE connector.
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Matt
___________________________________
CB400F 1976 -  Almost finished
CB400F 1977 - On the road!
Moto Guzzi Le Mans 2 - 1981 (undergoing a spruce up)
CD175 - To be restored
Triumph Speed 400
BMW F800GT

Offline Laverda Dave

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Re: Spark Plugs!
« Reply #3 on: May 27, 2024, 05:20:24 PM »
According to the Denso site the plugs you need are Denso-X22ES-U   4. I ordered a set from the Green Spark Plug Company on 24th April and I'm still waiting for them! I have chased them up twice now, the first time the response was they are waiting for Denso to send one plug to complete the order and second time I received no reply at all. Pretty shoddy service really and I wouldn't recommend them.
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1976 Honda 400/4
1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1978 Honda CB400/4 'Rat' bike
1982 Laverda 120 Jota
2020 Royal Enfield Interceptor 650

Offline Matt_Harrington

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Re: Spark Plugs!
« Reply #4 on: May 27, 2024, 05:25:27 PM »
Dave, I seem to get differing results:

https://www.denso.com/cgi-bin/global/plug/cross_ref/list.cgi?m=0&p=0

Or am I misreading it?
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Matt
___________________________________
CB400F 1976 -  Almost finished
CB400F 1977 - On the road!
Moto Guzzi Le Mans 2 - 1981 (undergoing a spruce up)
CD175 - To be restored
Triumph Speed 400
BMW F800GT

Offline Laverda Dave

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Re: Spark Plugs!
« Reply #5 on: May 28, 2024, 02:34:35 PM »
I think you are right Matt. I went onto the GSPC website and typed in my NGK plug code and that was the answer I got for the ND plugs I need. I have just gone onto the Spark Plug Ltd site and it is showing the same plug as you state, something strange going on!
I have now placed the order with the Spark Plug Ltd and given up with the Green Spark Plug Company after waiting nearly FIVE weeks for my order. I have contacted them twice to chase up the order and didn't even receive a response the second time. Terrible customer service so have asked for my money back and left them an appropriate review to reflect my frustration in dealing with them. How can a company show items as being in stock with a two day delivery at the point of order when clearly they don't have stock and are waiting on a delivery from the manufacturer! If they didn't have the stock they should have offered an alternative plug from another manufacturer instead of the radio silence!
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1976 Honda 400/4
1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1978 Honda CB400/4 'Rat' bike
1982 Laverda 120 Jota
2020 Royal Enfield Interceptor 650

Offline Spitfire

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Re: Spark Plugs!
« Reply #6 on: May 28, 2024, 03:05:25 PM »
I use both Denso X22ES-U and X24ES-U plugs in my 750F1 the last set I got from Sparkplugs Limited and had no problem with them.

Cheers

Dennis
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Re: Spark Plugs!
« Reply #7 on: May 28, 2024, 03:05:54 PM »
"According to the Denso site the plugs you need are Denso-X22ES-U   "

Honda contemporary manual agrees with this as alternative to NGK D7EA Dave.

Denso 24 = NGK 8 heat range.  With Denso 27 = NGK 9.
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Offline Nurse Julie

  • 1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
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Re: Spark Plugs!
« Reply #8 on: May 28, 2024, 03:08:16 PM »
That is really strange about the Green Sparkplug Company. We have used them regularly for NGK and Denso plugs and always had excellent service. Graham said they were having some supply issues but that was ages ago. Have you tried phoning them?
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LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline McCabe-Thiele (Ted)

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Re: Spark Plugs!
« Reply #9 on: May 28, 2024, 04:48:19 PM »
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Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
This is a neat 500 restoration in the USA.
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556

Offline Nurse Julie

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Re: Spark Plugs!
« Reply #10 on: May 28, 2024, 06:20:33 PM »
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LINK TO MY EBAY PAGE. As many of you know already, I give 10% discount and do post at cost to forum members if you PM me direct.
https://www.ebay.co.uk/sch/julies9731/m.html?item=165142672569&rt=nc&_trksid=p2047675.m3561.l2562

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline Deano400

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Re: Spark Plugs!
« Reply #11 on: May 28, 2024, 06:44:29 PM »
This is from a copy of the CB400 Owners Manual that I downloaded some time ago.

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Offline Laverda Dave

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Re: Spark Plugs!
« Reply #12 on: May 28, 2024, 07:45:47 PM »
Quote from: McCabe-Thiele (Ted) on May 28, 2024, 04:48:19 PM
Shown as in stock at Green Spark PLug Co.   Denso Standard Spark Plugs W22ES-U


 https://www.ebay.co.uk/itm/322961230619?epid=1843025240&itmmeta=01HYZY30W77Z3K3N2B8RSF8516&hash=item4b31fd4b1b:g:JqIAAOSw-09aQrZy&itmprp=enc%3AAQAJAAAA0ND6L3buyw7TUetkl6KfDSOS1ExqIGlI9c%2BrOKXaW3rnTQqM%2BxhABivnly4s%2FttLyKWrOf1dfYNO7YPB4P63tIawHUBQBnOQxXa0NYqyQCmrqo%2BxFmdXL7ojgGxLBeVjM7TMiYMmljV01KZaQBtwn2OdFWr6ypdBXNsjI6Wa8GLxofLtKFLrncuXG46WCM8evAevE4%2F6voNiceO0UB9O8CwS%2BGiYaxWTcOHvdVDd%2FQp55f%2FiNt8y636qyOkayRbSjb%2F656vghNvXB%2Bmz%2FAz0LbU%3D%7Ctkp%3ABk9SR5yOjP73Yw

I used them on a reccomendation Julie and wish I hadn't bothered. Not only do they have a supply issue but also a communication issue. They should have at least contacted me after nearly five weeks to say they have a supply issue and offer an alternative plug. The Spark Plug Ltd called me an hour after I placed the order on-line to say they were short of one plug but are getting new stock in tomorrow and will post the set out first thing on Thursday. That's what I call customer service. I think buying NGK's from shows is now a bit of a lottery.
« Last Edit: May 29, 2024, 09:23:28 AM by Laverda Dave »
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1976 Honda 400/4
1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1978 Honda CB400/4 'Rat' bike
1982 Laverda 120 Jota
2020 Royal Enfield Interceptor 650

Offline McCabe-Thiele (Ted)

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Re: Spark Plugs!
« Reply #13 on: May 28, 2024, 08:07:35 PM »
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Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
This is a neat 500 restoration in the USA.
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556
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