Resistor plugs

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Dekon
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Resistor plugs

Post by Dekon »

My neighbor gave me four brand new NGK B8ES plugs. Do you really need to run a resistor plug in the KDX?
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Re: Resistor plugs

Post by 6 Riders »

Isn't the stock plug a B8ES? I know I run resistor plugs, but I didn't think that they where called for.
newbbewb wrote:^what he said.
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Dekon
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Resistor plugs

Post by Dekon »

My manual states it a NGK BR9ES. A lot of people on this site say to run a BR8ES as a 9 is to cold. Oh yeah, forgot to mention that this an '89.
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Resistor plugs

Post by cornishwrecker220 »

If your neighbour gave you x4 resistor plugs then perhaps he/she is trying to tell you something? :evil:
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Re: Resistor plugs

Post by Joshmcmillan »

I have always used B8ES in E-series and H-series KDX200's, never had a problem
07' CR450X (Main Bike)
07' KX125 (Completed basket case rebuild, for sale)
88' KDX200 (Not sure yet, runs but with rattly top end)
91' CBR250RR
Old Bikes: 97' KDX200, 00' RM125, 85' XR350, 94' KDX200, 02' CR80, 82' XT250, 98' CT200
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Re: Resistor plugs

Post by 6 Riders »

OK, so the owners manual states that the BR9ES is the stock plug, but ALSO says that the B9ES is usable as an alternative. The B8/BR8 is a little hotter and tends to be recommended in the KDX...I run both and don't truly notice a difference.
newbbewb wrote:^what he said.
masterblaster wrote:Man 6 riders you rock.
*side note...I'm drunk, so try to read what I'm trying to say, instead of what I actually type
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Re: Resistor plugs

Post by bufftester »

All the resistor does is minimize RFI (static noise) generated by the plug. On multi cylinder machines with CDIs non resistor plugs could cause enough interference to harm the CDI...could...but doubtful. On the KDX the CDI is very simple and running a non-resistor plug will not damage it. You may , however, hear more static in your interphone system if you run one.
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Resistor plugs

Post by Dekon »

I just wanted to make sure I would fry the CDI. Thanks guys.
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Resistor plugs

Post by KDXGarage »

What year and model KDX is it????????????
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Resistor plugs

Post by Dekon »

Jason wrote:What year and model KDX is it????????????
Oops, I thought I had that in the first post. It's an '89.
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Re: Resistor plugs

Post by KDXGarage »

The stock plug is a B9ES, with no resistor. I never could keep a "9" heat range plug burned off. I had to switch to an "8" heat range. (the B8ES in question)
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