NGK BP 7ES RIP

RoadScholar

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I went to my local NAPA to get a box of BP 7ES, amongst other items. I got the box I was looking for, but the manager told me that these had been superseded by BPR 7ES. Those of you who run with EIs may want to consider Denso, Champion or Bosch replacements, or swap out your 5K caps for zero K caps.

Best.
 
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I just checked the NGK website and yep, discontinued. Time to stock up!
 
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NGK UK site still shows them as the correct plug for a Commando. No mention of not being available.
 

Slammin

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BPR is a resistor type, not recommended for stock ignitions.
 

RoadScholar

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BPR is a resistor type, not recommended for stock ignitions.
Resistor plugs are, in general, in greater use than non resistor plugs. Virtually all cars made have an individual coil/cylinder, on my Polestar Volvo the coils sit directly on the plugs, and, I'm on thin ice here, but I venture that these systems all use resistor plugs.

From a Commando point of view those that have been converted to the most current generation of EIs require 5K suppression, generally provided by resistor caps, if you want to continue to use your EI then you either have to switch to Zero K caps or find a different brand of plug that does not supply resistance.

Best
 
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Having farted around with automotive retrofit EFI for the last 5 years, I will skate on the thin ice and say anything with factory fuel injection that utilizes computer timing control would be using resistor plugs to reduce EMI. Non-resistor plugs can play havoc with computer controlled timing.

Summit Racing currently has BP 7ES plugs for $3.99US each. They went up. I bought them for $2.99 each in April.
 

illf8ed

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MichaelB posted this in July 2019 here. I bought some extras then.
448E5AB5-B261-416E-9ECF-DEC8BF1FE6BE.jpeg
 

jaydee75

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To get the resistance my TriSpark likes, I just use solid core wires (no R) and no-R caps, plus the R type NGK plugs.
Thus I can readily get the plugs my bike likes, BPR-7ES. Don't need to worry about obsolescence.
Jaydee
 
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Do people have an aversion to using Champion N7YC?
Nope, after a 240 mile run today with zero issues on the same plugs I’ve had in for two years. Was going to change them, saw no point. I do carry spares just in case!
 
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[QUOTE"Slammin, poste: 480805, membre: 10726"]
BPR est un type de résistance, non recommandé pour les allumages de stock.
[/QUOTE]


Yes R = résistor type for électronic ignition.
 
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I've been pretty loyal to the NGK BP7ES since acquiring my 73 Commando 750 3 years ago, I fouled a pair at a rally two years ago and was only able to get a set of very old, used Champion plugs from a fellow selling off a project bike. Those N4G plugs (long since discontinued) served me better and stronger for a solid year. I swapped back to NGKs but still ran into occasional fouling when running rich. I recently invested in a pair Denso 5307 IW22 Iridium Power Plugs and I could immediately see a positive difference. Bike starts up and keeps idle much easier, even after sitting for weeks. Don't think I'll be going back to NGK.
 
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Never did have any problems running Champion N7Y plugs in my Norton, it didn't like the NGK BP7ES and got a mis fire after a week of running and the same problem when running other brand of plugs so I have always stuck with Champions and since running my Norton with the JH Maggie and after 8 years or more with the JH I am still running the same Champion plugs I installed new when I put the JH on.

Ashley
 

Fast Eddie

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I've been pretty loyal to the NGK BP7ES since acquiring my 73 Commando 750 3 years ago, I fouled a pair at a rally two years ago and was only able to get a set of very old, used Champion plugs from a fellow selling off a project bike. Those N4G plugs (long since discontinued) served me better and stronger for a solid year. I swapped back to NGKs but still ran into occasional fouling when running rich. I recently invested in a pair Denso 5307 IW22 Iridium Power Plugs and I could immediately see a positive difference. Bike starts up and keeps idle much easier, even after sitting for weeks. Don't think I'll be going back to NGK.
If the Denso’s work for you then keep using ‘em!

However, at the risk of being a nerd here, it’s not really relevant to compare performance of standard plugs of one make to iridium plugs of another make.

FWIW I’m a fan of iridium plugs too and am also currently running Denso IW’s in my Commando, but I also use NGK Iridiums and cannot tell any difference.

Interestingly though, I have a T140 that I am convinced runs better with standard plugs !

Is anyone aware of any logical reason for this? Or am I just kidding / confusing myself (again) ?
 

Fast Eddie

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Never did have any problems running Champion N7Y plugs in my Norton, it didn't like the NGK BP7ES and got a mis fire after a week of running and the same problem when running other brand of plugs so I have always stuck with Champions and since running my Norton with the JH Maggie and after 8 years or more with the JH I am still running the same Champion plugs I installed new when I put the JH on.

Ashley
Ash... might be worth trying a new pair of plugs... you may find a performance boost...!
 
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I've been pretty loyal to the NGK BP7ES since acquiring my 73 Commando 750 3 years ago, I fouled a pair at a rally two years ago and was only able to get a set of very old, used Champion plugs from a fellow selling off a project bike. Those N4G plugs (long since discontinued) served me better and stronger for a solid year. I swapped back to NGKs but still ran into occasional fouling when running rich. I recently invested in a pair Denso 5307 IW22 Iridium Power Plugs and I could immediately see a positive difference. Bike starts up and keeps idle much easier, even after sitting for weeks. Don't think I'll be going back to NGK.


It’s often like that with the Ngks
 
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