Spark plugs

Last year I had a problem to start my engine and it was not running perfect with NGKBR8ES and then I installed some Brisk LR14C Super 1485, because my local shop only had them. They said it should be the same. The engine started easy and was running fine.

I can add the NGKBR8ES was almost new, but I have taken them out and in many times and had some problem with the carbs....

Was these problem because I have damaged the NGKBR8ES plugs or do my engine "like" the brisk one better .... ???

www.brisk.eu/catalogues/spark-plugs/moto/super


Now after I have rebuild the engine what shall I choice ?

I shall not have any problem with the NGKBR8ES ?

I have ordered new NGKBR8ES, but if I got problem to start the engine I will go and by some brisk and test also....

Hope I have been able to share my mind with you here hehe

According to the crossover chart I found, that is the correct Brisk to replace NGK BR8ES.
The engine likely does not care what brand the plugs are as long as the reach and heat range are the same.

I also found this interesting bit.
www.jegs.com/photos/0/084/084-sparkchart.jpg

TexasKZ wrote: According to the crossover chart I found, that is the correct Brisk to replace NGK BR8ES.
The engine likely does not care what brand the plugs are as long as the reach and heat range are the same.

I also found this interesting bit.
www.jegs.com/photos/0/084/084-sparkchart.jpg

Thank you, that is my understanding also... but you know when you have a feeling, it was so strange last time...
the only theory I have is is the gap has been smaller when I have worked with the engine, when I handled the old spark plugs...

Cross my fingers

The overview gave a good information about the spark plug !

The R in the part number stands for a resistor type plug and you shouldn't run these and resistor type wires together. Can't remember what you have for wires and coils. I run the copper core Dyna wires and B8ES plugs so I have no resistor in the wires or plugs.

I have:
1981 KZ750-H2 (Euro model). stock electronic ignition. green Dyna 3.0 ohm coils & Dyna 7 mm copper core spark plug wire set.

So these mean I shall have resistor type plug?
These mean I have ordered correct?

KZB2 650 wrote: The R in the part number stands for a resistor type plug and you shouldn't run these and resistor type wires together. Can't remember what you have for wires and coils. I run the copper core Dyna wires and B8ES plugs so I have no resistor in the wires or plugs.

KZ's come stock with resistor plug caps. That's all you need for most bikes. No extra resistor plugs or suppressor wires.

Nessism wrote:

KZB2 650 wrote: The R in the part number stands for a resistor type plug and you shouldn't run these and resistor type wires together. Can't remember what you have for wires and coils. I run the copper core Dyna wires and B8ES plugs so I have no resistor in the wires or plugs.

KZ's come stock with resistor plug caps. That's all you need for most bikes. No extra resistor plugs or suppressor wires.

Does these mean I have ordered wrong spark plugs, NGKBR8ES?

When I have :
1981 KZ750-H2 (Euro model). stock electronic ignition. green Dyna 3.0 ohm coils & Dyna 7 mm copper core spark plug wire set.

I just checked the factory manual and it says resistor plugs are recommended for Euro bikes. No clue why since the rest of the ignition system is same as other markets that use standard non resistor plugs. Apparently the resistor doesn't affect function enough to matter, and possibly Euro countries have more strict rules about spreading electronic interference which the resistor helps suppress. At any rate, upon review I don't think it matters what plugs you use in that regard.

My bad for not reading the manual earlier.

gordone wrote:

TexasKZ wrote: According to the crossover chart I found, that is the correct Brisk to replace NGK BR8ES.
The engine likely does not care what brand the plugs are as long as the reach and heat range are the same.

I also found this interesting bit.
www.jegs.com/photos/0/084/084-sparkchart.jpg

Thank you, that is my understanding also... but you know when you have a feeling, it was so strange last time...
the only theory I have is is the gap has been smaller when I have worked with the engine, when I handled the old spark plugs...

Cross my fingers

The overview gave a good information about the spark plug !

If the Brisk seem to work better, I say use them and be happy

TexasKZ wrote:

gordone wrote:

TexasKZ wrote: According to the crossover chart I found, that is the correct Brisk to replace NGK BR8ES.
The engine likely does not care what brand the plugs are as long as the reach and heat range are the same.

I also found this interesting bit.
www.jegs.com/photos/0/084/084-sparkchart.jpg

Thank you, that is my understanding also... but you know when you have a feeling, it was so strange last time...
the only theory I have is is the gap has been smaller when I have worked with the engine, when I handled the old spark plugs...

Cross my fingers

The overview gave a good information about the spark plug !

If the Brisk seem to work better, I say use them and be happy

haha will try to send them in return when I receive them and then by Brisk then....