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1949 ES2 spark plug

Submitted by terence_terrell on Sat, 06/07/2013
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Hi All

My 1949 ES2 has an iron head and seems to require a long reach plug. The recommended plugs are all half inch reach,the long reach plugs being listed for alloy heads

Which plugs do you other ES2 guys use ? Thanks for any info.

Terence

Submitted by gordon_johnston on Sun, 07/07/2013

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My iron head B31 uses an NGK B6HS (short reach) if that's any help. The long reach equivalent is B6ES. I should imagine your ES2 would use a similar heat range plug.

Submitted by terence_terrell on Sun, 07/07/2013

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Hi Gordon.

Many thanks. I will try the B6ES as,despite all the information avaiable in books,the depth of thread in the head requires a long reach plug. I did obtain a B6HS but as there would have been about a quarter of an inch of exposed threads to coke-up I thought better of it.

Best Regards

Terence

Submitted by roger_deadman on Tue, 09/07/2013

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Previously terence_terrell wrote:

Hi All

My 1949 ES2 has an iron head and seems to require a long reach plug. The recommended plugs are all half inch reach,the long reach plugs being listed for alloy heads

Which plugs do you other ES2 guys use ? Thanks for any info.

Terence

Submitted by terence_terrell on Tue, 09/07/2013

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Hi Roger

I will try N5 and see how I get on. This bike is new to me and I have had a problem with the engine stopping dead after 20-30 mins. running. Have checked fuel flow,which is OK, and before I assume a magneto problem I thought I would try various new plugs.

Best Regards

Terence

Submitted by ian_soady on Sun, 24/06/2018

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I've just come across this thread. Like Terence, I've found that the recommended plugs seem to be short reach ones whereas the thread in the head is clearly for a standard (3/4") plug.

I have fitted a L82C short reach item as recommended by the Green Spark Plug Co but this causes lots of popping and banging.

At least it has given me the opportunity to strip & clean the carb, reset and clean the points, and get the ignition timing correct - it was 5/16" BTDC instead of 5/8"!

Submitted by terence_terrell on Sun, 24/06/2018

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Previously ian_soady wrote:

I've just come across this thread. Like Terence, I've found that the recommended plugs seem to be short reach ones whereas the thread in the head is clearly for a standard (3/4") plug.

I have fitted a L82C short reach item as recommended by the Green Spark Plug Co but this causes lots of popping and banging.

At least it has given me the opportunity to strip & clean the carb, reset and clean the points, and get the ignition timing correct - it was 5/16" BTDC instead of 5/8"!

I have found that NKG BR8EIX Iridium performs well, but without a suppressor cap, for my magneto ES2

Submitted by richard_tool on Mon, 25/06/2018

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I have run Champion L86C in my 1950 iron head magneto ignition ES2 for 6 years/3k miles with absolutely no issues whatsoever

 


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