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Glad i read this, i'm using resistor plug caps AND plugs on a project i've yet to get running! Thing is the coils are proper flamethrowers!

Mate have had the HT leads on for quite a while so cant remember the difference but the plug change from the DR8EA to the D8EA was noticable.
Nicer idle for a start .
What are the coils you are using ?

GM LS2 Coils (D585)




So, i have 5k resistors in my plug caps, im using BR9EV plugs, i should look for B9EV ones?

Will this create interference?

www.ngksparkplugs.com/techinfo/spark_plugs/faq/faqresistor.asp
I would go for the non resistor type - only improved things on the Zephyr. Should only interfere with computers , radios etc.
Your bike would have points wouldnt it ? Shouldnt be a problem i reckon .
I am looking at getting new coils so will have to check those ones out,

No, I don't have points, in fact I have a full on ECU that controls everything.............. Sequential injection etc.

The GPz turbo uses BR9EV plugs as standard & resistor caps too so it must use them for some reason?

Those coils will be overkill on your zephyr if that's what you're putting them on, they have a built in igniter too so won't work on a std setup. Dyna green or grey would be a good bet for coils depending on what the std coils primary resistance is, green for 3-Ohm & grey for 2.2-Ohm

Yes, just one resistor element in each plug path. I prefer resistor wires over resistor plugs or caps. I've seen too many failed caps and plugs.

Hello Lou!! Was nearly gonna mail you about this! lol

So, if Kawasaki made things like that from the factory should i be changing it? I'm sure modern ECU's have more EMI protection than back in 1984 when the bike had a primitive ECU but im wary about changing what they seen as proper setup from the factory.

I got this reply to asking the question on the Turbo site,

Steve, on my stock bike I replaced the OE caps (NICHIWA LB05F) with super seeded NGK LB05F. Part No 8051
OE and super seeded are resistor caps.That bike although in race mode runs stock setup and runs well on BR9ES plugs

Hi Steve,
Your reply, just before mine, was not there when I initially started to reply. (Sometimes I get distracted in the middle of a reply and have to come back to it later.) I thought you were talking about another standard KZ.

With the ECU, Kawasaki may have indeed had a reason to do what they did. Perhaps with the extra cylinder pressure from the turbo, which effectively increases the spark's required voltage, there is more interference, so Kawasaki put in the extra resistive elements in the spark path. Regardless, if Kaw made it that way, it should work. It could get pricey to take a chance and see if the ECU can take excess EMI pulses.

My buddies RD400, with solid wires and no resistors, has fried more than one multimeter. Two strokes (in addition to turbo bikes, and high-compression bikes) can also have an extra high voltage requirement at the plug due to oil fouling. That's why they sometimes do better with CDI.

Thank goodness!! I was seriously worried about removing 1 resistor source & maybe ending up frying my ECU. Glad that's 1 thing I seem to have done correctly!!