Maintenance & Technical > KX500 Original

What spark plugs do you use?

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reknelb:
Like a dummy, I went to the auto parts store and didnt write down which plugs I needed. I asked the guy if he had a cross reference book for motorcycles. He's says yes and looks up my bike ('90 kx5), sells me 3 br9es plugs. Never even looked to see if they were the right plugs. That was over a month ago. I only noticed today when I was making some jet changes to try out (for when my new intake boot arrives). The plug I had in was a b8eg. Totally different. Non resistor, different heat range, smaller electrode. :roll: You guys ever mess around with plugs or do you all use the recommended stocker?

reknelb:
Anyone know if the stock plug cap has a resistor in it? The 9 is a little colder heat range, and the g is for racing as opposed to the s for standard electrode.

2002KX500:
BR8EIX here(2002 KX). Never had any problems with the NGK line.
Looks like you can use the same or a B8EGV or B8EG. You can go to NGK's website to confirm your application.

Good luck.
Kevin

KXcam22:
I run a cheap BPR8ES.  The P is a protruded nose.  Read about using the P type since they run cleaner. Been my exclusive plug for the last 10 years. Have had very good luck - they last a whole season.  I get then at the autoparts store.  Haven't tried the BR8EIX, there are many who swear by them. Cam.

reknelb:
I used to use the projected nose in my cr250. The projected nose should actually bump the compression up a tiny bit , no? Takes up more space in the combustion chamber :?  I have a bunch of b8es plugs I can run. I'll try the br9es plugs if it ever gets over 80 degrees here this summer.

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