Spark plugs with resistors for these GS series bikes?

[Kentman7]

Do the spark plugs for these old bikes require the spark plugs with resistors?

[Kentman7]

I’m having the same exact problems that are stated in this video for having non resistor spark plugs.

https://youtu.be/kkVjHGA5cws?si=A65zxUcxwk1JJx53

[rphillips]

I don't think resistors are ever "required", just recommended. I don't think "GS's" even recommended them. My "91" GSX 1100 G does recommend them.

[bonanzadave]

Pretty good application chart at Bikecliff

General Suzuki Specs (bwringer.com)

[Grimly]

Resistor plugs are not required, but the presence of a 5K resistor is. That 5K resistor can be in the plug or plug cap, but preferably not both.

[rphillips]

This non mechanic wonders what would happen if there were no resisters anywhere? I've always heard they only keep static off radios.

[Nessism]

GS bikes have a 5k resistor inside the spark plug cap. For this reason, resistor spark plugs should not be used.

NGK seems to be discontinuing non resistor plugs, but there is always ND, which are similar quality. Or, the plug cap can be taken apart, and the resistor element removed. You have to fashion a copper spacer in place of the resistor, though. I've never done it, but it seems easy enough.

[unfocused]

I don't run any resistor. I have after market electronic ignition, 4.3ohm coils, 90 degree boots and stock plugs gapped at .030 - no issues with this set up. Pulls hard into triple digit speeds.

I've run several other set ups without resistors and no issues as well.

Both 77 GS750 and 78 GS 1000.

However, if you see a sign that says turn off 2-way radios, you might want to turn around as you might upset someone LOL
Resistors were used to prevent erratic electronic signals - aka radio noise, ant races, fuzzy stuff.