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This might be useful--> NGK BP7ES cross REF Guide
- Thread starter HOTEL71
- Start date
jonesey
Dyed in the wool 650 nut
Many Thanks Hotel, very useful.
You need to be cautious using this cross-reference. It seems to be based on physical dimensions and possibly?? heat range. Note that the BP7ES is a non-resistor type yet it is cross-referenced to Autolite 63 which is a resistor type. If running resistor spark plug caps then go for non-resistor spark plugs.
Champ. N7YC is probably a good replacement. The forgotten N7Y is spec'ed in the manual beside BP7ES, and the 'C" is its current iteration at Champion
Back in the 70's we always chucked the Champions in our Brit bikes in the trash and substituted NGK, they lasted longer and fired more reliably without fouling
DirtyErnie
Renaissance Hick
My Briggs 5hp lawn mower thinks exactly the same way. It's nice to see that some things are consistent in the long-term.
I'll never forget fitting four new Champion plugs as part of a service on a car, and the damn thing wouldn't start.
Much head-scratching and diagnosis followed, eventually replacing the new plugs with four new ones.
Bastard still wouldn't start.
Turned out the entire box of ten Champion plugs were duds.
Never used them since.
Always fitted NGKs and occasionally Denso since then and never had a bad one.
Much head-scratching and diagnosis followed, eventually replacing the new plugs with four new ones.
Bastard still wouldn't start.
Turned out the entire box of ten Champion plugs were duds.
Never used them since.
Always fitted NGKs and occasionally Denso since then and never had a bad one.
Resurrecting this thread, looking at alternatives to BP7ES isn't as simple as it sounds. I have found that any equivalent look up returns a multitude of "compatible" spark plugs for most brands. But there seems to be no discrimination on resistor versus non resistor plugs. They appear to be regarded as interchangeable. And they aren't.
Anyway, searching here for equivalent plugs from Denso as an alternative to NGK BP7ES doesn't really turn up much information.
I have found a local supplier just a few miles from me who stocks Denso plugs at a very good price. I have usually bought NGK off eBay but that seems to be getting a worse idea by the day.
Local supplier offers Denso W22EP-U but cannot confirm to me these aren't resistor plugs. The Denso website doesn't say. But there's loads of plugs look similar but have an R in the part number. They're clearly resistance plugs, I'd say.
I am pretty confident W22EP-U (no R in the part number) are a true BP7ES equivalent. I think as they are available so local and not expensive, I think I'll buy some and measure the electrode resistance for myself.
Anyone here knows these plugs?
Anyway, searching here for equivalent plugs from Denso as an alternative to NGK BP7ES doesn't really turn up much information.
I have found a local supplier just a few miles from me who stocks Denso plugs at a very good price. I have usually bought NGK off eBay but that seems to be getting a worse idea by the day.
Local supplier offers Denso W22EP-U but cannot confirm to me these aren't resistor plugs. The Denso website doesn't say. But there's loads of plugs look similar but have an R in the part number. They're clearly resistance plugs, I'd say.
I am pretty confident W22EP-U (no R in the part number) are a true BP7ES equivalent. I think as they are available so local and not expensive, I think I'll buy some and measure the electrode resistance for myself.
Anyone here knows these plugs?
To close out what I wrote above for future reference. I can confirm I've measured the electrode resistance compared to a BP7ES. The W22EP-U plug from Denso measures identically. That's to say, neither plug has much resistance at all on the centre electrode. I think therefore that W22EP-U is a genuine alternative to BP7ES. Hope that helps someone in the future.
Does the nose project the same?
Thank you!!
Info sheet from the Denso website as reference, contains cross reference for heat ranges, thread sizes, projection types, materials etc.
Excellent find thank you. I looked, but failed to find that myself.
If desperate for BP7ES then just go for the slightly cooler BP8ES, they should work just fine. I changed from the 7 to the 8 a few months back on my Virago and they look good after 800 miles - can load a photo if anyone wants to see.
I need BP6ES for my XS1100. They’re even tougher to find. My stash is extremely small.
Indeed. Though my idea recently was to find a viable alternative to NGK which is readily available. Denso seems OK and is available within 3 miles of where I live.
Sir might wish to consider these as an alternative to BP6ES?
https://www.gsparkplug.com/1x-denso...0ep-u-w20epu-067600-7241-0676007241-3043.html
