Maintenance & Technical > KX500 Original

Do the 5k or 10k Ohms resistors go in time in the spark plug CAP ?

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kiwikx500:
Mines a 1990 would anyone know what size out of the two mine is meant to be,i want to ohms test it.Whats the resistors actual purpose ? Does it weaken the spark if it goes ? Cheers  8-)

hughes:
In most cases they increase their resistance if they are going bad. ohm test yours and that will tell what you have. The resistors help cut down on RF's. Is your plug cap the factory cap? I will test mine tonight.

kiwikx500:
Cheers,Yep mine the original cap.What does RF stand for please ?

hughes:
Radio Frequency. To test the plug cap it needs to be unscrewed from the high tension lead. You will need some kind of multi meter like a fluke meter to test the cap. You measure from one end to the other of the cap. My Clymer manual doesn't offer a spec. but NGK only offers 5k or a 10k.

gowen:
I find it a complete pain in the ass to check the cap. Best best is to remove the cap and check the spark from the line to the cylinder without the cap. Then install the cap with a plug and see if you get the same spark from the plug. I've RARELY seen a bad cap. Doesn't happen often, but they are cheap to replace.

Good luck

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