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Spark Plug Caps

  • Thread starter Thread starter Anonymous
  • Start date Start date
A

Anonymous

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I've search a few times now and cannot seem to find a definite answer, I need to get myself some new spark plug caps (a couple a corroded). It appears from searching that the caps need to have some resistance but just how much resistance? Should it be 1k, 5k, what's the difference (and don't say 4k :wink: )? Consequences of lower resistance?

Thanks
 
I bought some NGK caps. I believe they are 5K. I've seen them recommended here many times.
 
I second that, and my local M/C shop had tehm for $3.80 each. The 5k is what the stock ignition uses. :twisted:
 
5k Caps.

5k Caps.

Get the 5k caps.

I used two straigt SDO5F
and two angled VD05F

The D means that they are made for smaller plugs.
The caps are the same just the rubber fits a little more snug.

If you want the looser correct size go with the B05F.

The dealer and den kirk should be the same price. About $15.00 for all four. If you order from den kirk you can get a 70" roll of new 7mm copper core wire for $3.00 to replace your old wires.
 
what does the resistence do? can't you just run regular caps with out the resistors? i'm running accel coils and wires and there are no resistors in there as far as i can tell?

ryan
 
first timer said:
what does the resistence do? can't you just run regular caps with out the resistors? i'm running accel coils and wires and there are no resistors in there as far as i can tell?

ryan
Click to expand...

Exactly, why use 5k? If it is to suppress interference with radio/tv then I don't care
 
You don't need the caps with a built-in resistor. They are meant to suppress interference.
In fact you should get a better spark using standard plug caps.
But if your coils are okay, it wouldn't make much of a difference.
 
If you have electronic ignition you need them.

If you have electronic ignition you need them.

If you have electronic ignition you need them. Other wise the igntion will have trouble. I'm not sure if the Automotive radio suppresion wires are a good substitution for the caps, but your safest bet is to stay with the resistor caps, solid core wires, and non resistor plugs.
 
Thanks for the contradicting replies, it really helps :lol:

I actually heard a rumour yesterday that NGK are to phase out the 5k caps since its only the older bikes that require them (apparently). Not sure if thats worldwide or just nick of the woods.

Cheers
Anthony
 
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