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Is the higher the number on NGK spark plugs the hotter the range?

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Posted on Jul 27, 2019


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SOURCE: what Spark plugs to install?

yes the 8 is the hotter plug just for giggles how do you know that it's running lean? have you had someone put it to the 4or5 gas analyzer, NOT A DYNOJET DYNO? it's the only way to know for sure and by how much. the reason i say not the dyno-jet is because of the fact that it uses a wide band 02 sensor which in this case only gives a limited amount of info versus the 4gas. some people have said the hotter plugs has run better for them, but i can'tconfirm. i can confirm that i hadn't noticed much difference between the Iridium plugs and the stock. no improvement on the dyno and nothing really noticeable anywhere else. for the price of stock NGK's thats what i would stay with. marco,,,

Posted on Nov 10, 2008



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SOURCE: Changing the spark plug on a KTM Motorcycle

.028 to .030

This was one of the easier questions. Thanks for the break.
Please rate this answer. Thanks!

Posted on Apr 14, 2009


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SOURCE: Spark plugs question

DR8ES is the stock plug for your bike. The heat range is the same on both plugs, The "A" designates a special tip construction. The "S" designates standard tip construction. Bottom line is The DR8EA is a higher priced plug and it will work fine.
Can I get a “very helpful” rating on this answer?

Posted on Aug 20, 2009

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SOURCE: spark plug for 2006 HD sportster the plug is a NGK

emegtei hvnig dur taviulah arga 2007 satrip

Posted on Sep 13, 2009


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SOURCE: what is the exact number

The spark plug number from Toyota Parts is 9091901059, which crosses to BPR5ES-11 for the standard plug from NGK.
If you are having problems with the plugs burning out to quickly, I would have to ask if this HiAce is a dual fuel model? Maybe they removed the LP system before you bought it, and that's causing the problems your experiencing?
Also the HiAce is an 80's minivan not an '02 Camry.

I hope this helps!

Posted on Dec 25, 2010

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I have a polaris ranger 6x6 500cc the plug in it now is a ngk bkr5e 7938. a friend gave me 2 unused ngk b7e s plugs and said that they wood run fine. Are these 2 ngk b7e s ok or what?

The figure 7 represents the heat range of the plug. Usually it is unwise to deviate from specifications unless problems force choosing a different heat range. If the spark plug regularly fouls then a hotter spark plug could improve the problem - with NGK that would mean moving from 5 to 4.

Any move must be made with care to avoid the engine damage possible if the spark plug is too hot.

Hot and cold plugs, incidentally, indicate the amount of heat the spark plug dissipates from the centre to the body and doesn't affect the temperature of the engine. Broadly cool running engines need hot spark plugs and hot running engines need cold plugs so in each case the spark plug nose will achieve the self-cleaning temperature without becoming too heated.

Moving from a 5 heat range to a 7 (NGK) is moving to a colder plug so yes it will run fine, at least for a while, though you could find plug fouling might be a problem...

Jun 18, 2017 | ATVs

2 Answers

What is the correct NGK spark plug for my 1967 Triumph Tiger

I get two numbers...,
L6G or a L82C Champions

the L is the reach (1/2") and the numbers are the heat range.. On a Champion spark plug the lower the number the COLDER the spark plug.. the higher the number the hotter the spark plug,, If you look at the spark plug hole, you should be able to tell if the length of the threads in the head are about 1/2" deep..I would start with the L6 if you can get it.. if it runs without fouling.. keep running it.. if it fouls..looks black and sooty.. go to the L82.

Jun 13, 2017 | Triumph Motorcycles

1 Answer

Hi I need to go up 1 heat range from an ngk cr9eh 9 , what plug would I need , cheers

Cr8eh, the smaller the number the hotter the plug. Check NGK website for help.

Jan 02, 2017 | Motorcycles

1 Answer

What type of spark plug will i use NGK BKR5E-11 or BKR6E-11? i usually travel 8 km and 8 km back with speed of 50 km

Both the spark plugs are the same. The only difference between the two is the heat range number. BKR5E-11 is the hotter plug and BKR6E-11 is the medium hot plug which offers better heat of dissipation. . Better to go for the BKR6E-11. It can be used safely for both local drive and as well as for the long drive.

May 29, 2015 | Cars & Trucks

1 Answer

Ngk spark plug gap chart

usually around .028" - .032"..

r = resistor
b=thread size = 14mm
7 = heat range - NGK, the lower the number the hotter the plug. Other mfg. are opposite - higher number=hotter
h = thread length =1/2"

These are THE important ones... the rest are mfg. specifics

May 25, 2014 | Mercury Boating

1 Answer

What is the difference between BR8HS and BR4HS spark plugs. Cheers Paul

The numbers 4 and 8 are heat ratings. The lower numbers run hotter. Different heat ratings allow you to choose the best compromise between keeping the plug from fouling and making the electrode last longer. If your plugs tend to foul, you need a hotter plug. If they tend to fry away, you need a cooler one. As engines get old, they tend to need hotter plugs. The differences in the heat ratings can be seen in subtle differences in the dimensions of the electrode (usually the center one) and the little insulator around the center electrode. The dimensional changes effect the heat transfer characteristics of the plugs, which changes how effectively the high temperatures present at the spark are conducted away. Besides the heat rating of the plug, the other big factor is having a nice clean thread surface in the engine block, which is why some mechanics will use a thread chaser when changing plugs. Here's a link to NGK's numbering meanings
I hope you found this helpful.

Aug 27, 2010 | Spark Plugs BR4HS Plug 10/BX #3322

1 Answer

Spark plug keeps oil fouling. What band of oil shoul use? Is 40:1 gas mix good? also wat spark plug? BR9ES, BR8EG, or R7376-9?

32 to 1 is the standard mix. That is 4 ounces two stroke ENGINE oil per gallon. The brand doesn't really matter. Don't use MOTOR oil in the gas. The stock plug is NGK brand, R6918B-9. I would suggest a hotter plug, R7376-8. The last digit is the heat range. The lower the number, the hotter the plug.

Feb 11, 2010 | 2004 kawasaki KX 125

2 Answers

2003 Yamaha 125 yz plug fouls pretty quickly. running 32/1 fuel oil ratio, and using NKG plug 2411/B8ES. Do we need to run a hotter plug?

NGK BR9EG is the stock plug for your bike. You are one heat range hotter already. I suggest you go to a BR8EG to keep you in the racing plug style but one range hotter than stock. I question what 2 stroke engine oil you are using. Stick with Yamalube 2 stroke oil and you should be okay. If you are using standard motor oil like you have in the gearbox then the fouling is definitely the oil.

Oct 27, 2009 | 2003 Yamaha YZ 125

2 Answers

Spark plugs question

DR8ES is the stock plug for your bike. The heat range is the same on both plugs, The "A" designates a special tip construction. The "S" designates standard tip construction. Bottom line is The DR8EA is a higher priced plug and it will work fine.
Can I get a “very helpful” rating on this answer?

Aug 20, 2009 | 1988 Suzuki GSX 600 F (Katana)

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