BR9EG-N spark plug

[oldfrt613]

My CR has developed a severe miss when I really get on it. I have discovered that the gap on my plug is almost twice what it should be. Does anyone know what the significance of the "-N" at the end of the number means, I ask because I have some Iridium plugs I would like to put in.

 

[dales298]

Try this it's from NGK's website.
http://www.ngksparkplugs.com/techinfo/spark_plugs/partnumberkey.pdf
Our cr80 uses a regular NGK plug.

Dale

 

[oldfrt613]

Near as I can tell is it is a special side electrode. I did notice a "grooved" electrode on the thing similar to the Nipodenso u-groove. Think I'll try an irridium one. Thanks for the link !!!

 

[sandflyz]

the br8eg thats suposed to go in your bike has a resistor in it. Thats why there so expensive. Without the resistor the plug screws with your iginition map. Maby the n has something to do with that?

 

[oldfrt613]

sandflyz:

The "R" after the "B" is for resitor type ..... The "B" is thread size. Number is heat range, "E" is thread reach and "G" is electrode type. But thanks for trying to help, but no info is better than wrong info. I have contacted NGK to verify crossover to a BR9EIX ( iridium electrode ).

 

[Lokair]

Is the resistor all that important. I know a few guys who are racing who do not buy the br plugs but instead get the b8es and such, they seem to have no problem? I just checked my bike and I am also running a non R plug with no problem.
Lok

 

[oldfrt613]

Depends on the ignition type and how suseptible it is to electromagnetic interference. Frankly it is silly to risk a problem for the insignificant cost differnece between the plugs.

 

[skipn8r]

My CR has developed a severe miss when I really get on it. I have discovered that the gap on my plug is almost twice what it should be. Does anyone know what the significance of the "-N" at the end of the number means, I ask because I have some Iridium plugs I would like to put in.

I can't find the article, but I remember Dirt Rider recommending a BR9EG-N-8 and that's all I've run. I've compared it with a BR9EG and didn't see a difference. Seems to run fine.

 

[oldfrt613]

I'll post what I find out from NGK.

 

[oldfrt613]

Form NGK:
Use this plug only .
The N is for a thicker ground electrode, use of other plug may result in ground breaking of and cause serious engine damage.

Sounds ugly to me.

 

[Faded]

Suzuki RM's had this problem a while back and NGK made a special plug for them. They sited harmonics inside the combustion chamber that caused the ground strap to fail.

 

[jrm]

Old frt,
That's consistent with what my dealer told me too. Can't use a regulart BR9. Something to do with the reconfigured combustion chamber on the '05s. (Probably the same change that makes them knock on pump gas).

 

[oldfrt613]

Funny, when I called the dealer, the microfice shows the standard plug as BR9EG. I had to ask for the BR9EG-N-8 ( which is the same price ).

 

[jrm]

Maybe that's why every time I need to buy some they have to special order them.

 

[oldfrt613]

And they wonder why people use mail order !

 

[redrider8]

I agree with you about the dealers. I went to get a new plug for mine and the guy give me a BR9EG and I had to argue with him and tell him it took the BR9EG-N-8. After about 5min. I took him and showed him the one in the show room what it took.