Honda-SOHC
SOHC.co.uk Forums => CB350/400 => Topic started by: Matt_Harrington on May 27, 2024, 02:19:01 PM
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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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Looks like these:-
https://www.sparkplugs.co.uk/motorcycle/spark-plugs/motorcycle/champion-denso-beru/honda/405/cb-400-four-37hp-27kw/1975-1978/10750_420061
Looks like only Resistor type at sensible price end!
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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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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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Dave, I seem to get differing results:
https://www.denso.com/cgi-bin/global/plug/cross_ref/list.cgi?m=0&p=0 (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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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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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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"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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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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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
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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
Its X22 or X24 thats needed, not W**
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This is from a copy of the CB400 Owners Manual that I downloaded some time ago.
[attach=1]
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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.
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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
Its X22 or X24 thats needed, not W**
Predictive text strikes again Julie!