Spark Plugs -- Let's see 'em

[billie_morini]

Here's mine pulled from my KDX 220 after several hundred miles. The majority of my riding is 2nd gear & moderate RPM in very steep mountains.

[brademan76]

Not an H model... '93 200E. Wife's bike, pretty wet and gunky. She doesn't get it up into the higher RPMs much. I'll pull my 220 plug tomorrow.

20250224_145114.jpg (1 MiB) Viewed 6807 times

[KDXGarage]

What plug is that? What heat range?

[billie_morini]

brademan76, thank you very much for sharing requested photo.

[billie_morini]

KDX-G,
if you are asking me: "What plug is that? What heat range?"
Then my answers are BR8EG and 8.

[KDXGarage]

Nah, bradememan's

[Chuck78]

No photos of plugs here, mine was always a bit rich in the lower end on the 220 when running the older style Lectron carb as the metering rod doesn't have much adjustment other than the full range, with a supplementary top end wide throttle opening high RPM jet to add more. The Lectron Billetron Pro Series is a blessing with its low rpm pilot/torque jet type adjustable jet and top end power jet that is also adjustable, both with turning a knurled thumb screw, making "jetting" on the billetron far easier than any other carb. You set the metering rod height to get the idle with the baseline screw settings, and you should be able to leave the metering rod alone unless the mid-range is drastically off.


The big reason I was chiming in here was because I think I'm going to jump back to using Denso spark plugs, as NGK has so many fakes and forgeries on the market, and some of the genuine NGK plugs now after being moved out of Japan for production for components or complete spark plugs, don't even pass the genuine NGK authentication inspection points!
Denso I thought were great until one of them had a compression leak on it, not anything major but I wondered why there was a darker residue coming out from around the base of the porcelain above the hex. I think NGK now has stooped down to a lower level and I will try Denso iridium plugs again I've seen more NGK spark plug failures, I believe in the internal resistor, in the past few years, then I ever have in the rest of my 46 years.... Not sure if those were fakes bought off of eBay or scAmazon, I've even heard of some of the actual legitimate stores accidentally buying pallets full of fakes...
This is certainly a strange time to be alive. You can't trust much of anything anymore, but at least on average Chinese quality has gone up for the better products at least, they are capable of producing any quality level required in general, but often the generics are made of very low standards or cheap alloys or other materials.

[brademan76]

What plug is that? What heat range?

NGK B9ES heat range 9

[KDXGarage]

Switch to an 8, please. That, or go tell her she is going to have to wring it out a lot and then tell her "DO WHAT I SAY". OR....switch to an 8. Either way.

[brademan76]

Will do both! My 220 plug below. It's a BR7S. A little better.

20250225_164420~2.jpg (313.46 KiB) Viewed 6628 times

[KDXGarage]

What is all that crust on those plugs??

[brademan76]

The 220 plug had decent amount of spooge leaking out around it as it was a little loose. Couple that with a chalky desert dirt ride a few weeks ago and no wash since.

[billie_morini]

Bradman, thank you for sharing a spark plug photo from another 2-stroke motorcycle.