Spark Plugs

[Franjo]

If you want to avoid faked NGK's have a look at this page:
https://www.ngkntk.com/de/newsroom/blog/dach/faelschung-oder-nicht/
There are a lot of pictures which show the difference.
But until now I didn't hear hear of a faked B8ES. They are too cheap. But Iridium plugs could be affected.

[Astute Greaser]

And if you want to use other than NGK here is the cross ref for NGK8HS the short reach 1/2" including Champion    . Not sure about the heat bands as some makes have lot of alternatives but possibly most are supersessions 
https://www.sparkplug-crossreference.com/convert/NGK_PN/B8HS

[Cocoablini]

This is up there with motor oil discussions or octane! I had no idea

[c50]

This is up there with motor oil discussions or octane! I had no idea

No reason  for it to be. In over 40 years never heard much noise about it before. We used NGK and Champion regularly without any issue or tales. The N3G was desirable, but most didn’t want to pay the extra. I have Iridium resistor plugs and none resistor caps  in one of mine and they seem very resilient to oil and extreme heat along with easy starting.

But as I said, isn’t the spec for the 78/79 250E’s B9ES and NOT B8ES ?

[Kickstart]

i purchased 4x ngk b8's from the Stafford show and all 4 were duff

[Tailchaser]

You are correct Mr C:

[5port]

NGK seem better in my 2T bikes.  I use the Iridium IX, I think there is a noticeable improvement over the B8/9ES that is worth it to me.

5port

[BlueSmoked]

Agree with 5port.

If possible, go for Iridum ones. Run BR9EIX for almost 11k km. Still blue spark. No problems with running to rich even to top of mountains (2.5 km above see). Cost are now around 15 euro each.