5k ohm or 10k ohm plug caps

[Gorminrider]

It's hard to know exactly if they mean cars (with suppressed leads vs our plain wire ones) but sure, it's not something I'll ever notice as an engine-tuning either whether 5k or 10k. It's only popped up once as a possible troubleshooting solution that I remember too..someone here with Boyer ignition that had a bike that quit unexpectedly without "the right suppression".
still, for interest sake, AM/CB radio effects are just the one most oldsters have heard. These radios have powerful receiving stages, their antennas are long and their wiring and components often from a different era.
but,from that link: (http://www.ngk-sparkplugs.jp/english...q08/index.html)

Resistor spark plugs prevent electrical interference that can disrupt car radio reception, two-way radio and cellular phone operation..This type of spark plug also prevents electrical noise from interfering with the operation of the computer in the engine.

... shielded wire and components aside, any wire is capable of "reception" but the length of it and whatever is connected of course matter too- protection will be designed in for most common problems and the car next to me won't quit because I don't have suppression!...

ps I still like AM radio. I can pick it up anywhere...

[Nessism]

5k cap, copper core wiring, non resistor plugs is the OEM configuration. Why deviate?

[Gorminrider]

My assumption has been that the OP's bike (79 850) came with 10k caps. The question arises: why or why not?

but, whatever, I think now I'll put some on my lawnmower.

[748cc]

Chasing a spark issue on my ride, I measured the OEM cap in question and IT measured at ~10K. And I can't locate any factory text that specifies what the stock caps alone should measure at-I'm sooo confused!! Just because NGK states that XB05F replaces Suzuki P/N ' xyz' don't make it correct, only that that's all they have to offer as a 'substitue for'. I guess the safest bet is to measure cap to cap, and if it measures at ~33K you're golden. Oh, and my ride sports an AM/FM radio, so the suppression value matters if I care to tune in via 'old school'.

[Grimly]

Gold standard would be to hear from someone who has used the 5k caps on a '79 GS850. Having said that I can't see any reason why the 5k caps wouldn't work on my bike.

Never been anything but 5k caps on mine. Except for just now, where I'm running 5K resistor plugs and no-resist caps with ultra-special (fell off a Hyster truck) silicone 8mm leads on the '80 bike. Only reason they're ultra-special is the price Hyster charge for them, but they're damn good leads.