Resistor or non resistor caps

[Mikey]

I've bought a few of the NGK LZFH 8381 caps so I would have resistance somewhere in the ignition when running AP63 plugs and now Im going to get a few of the non resistor caps so I can run https://www.ebay.com/itm/304559253439
But looking at ads for the NGK caps the ads seem to state it both resistor / non resistor caps for the same NGK LZFH 8381
https://www.ebay.com/itm/142555686536

Ngk - Spark Plug Resistor Cover Lzfh - 8381​

Ngk
SKU: WSP-45-9511
|
UPC: 087295183816

$1.27


I have 2 bike with the NGK 8381 on the with the non resistor plugs AP63
If the bikes run fine with above the caps have to resistor type ?

 

[Mikey]

This is what I have now believing they are the resistance caps

 

[Jim]

 

[Jim]

Per your pic of the box.... LZFH

L= 90° Elbow Type
Z= Suitable for 10,12 and 14mm plug threads
None (no number)= No Resistor
F= Terminal Stud
H=Compact Type

....LZFH

 

[Jim]

But looking at ads for the NGK caps the ads seem to state it both resistor / non resistor caps for the same NGK LZFH 8381
https://www.ebay.com/itm/142555686536

Here's what I saw on your link Mikey.

 

[Mikey]

It's strange why the internet ads call em either way and the bikes run fine with no resistance in the circuit
Thanks !!
Now I'm going to sit out in the snow and wave at the neighbors and not let let all this bother me anymore

 

[jpdevol]

Those appear to be the non-resistor caps suitable for BPR7ES plugs.

The NGK caps can be confusing and their suppliers often add to that with incorrect listings.

Another alternative from a good MN vendor:

https://www.denniskirk.com/parts-unlimited/klg-plug-caps-98.p2068.prd/2068.sku

....Non-resistor and the terminal designed to use the ferrule that threads on the spark plug

 

[Mikey]

Yeah I saw that but a place called active powersports is calling them resistor caps
Your right on the non resistor cap and active powersports got it wrong

 

[Jim]

and the bikes run fine with no resistance in the circuit

But there is resistance in the circuit. At least there should be. If you use the non-resistor caps, you run resistor plugs. There's your resistance.

 

[Mikey]

Those appear to be the non-resistor caps suitable for BPR7ES plugs.

The NGK caps can be confusing and their suppliers often add to that with incorrect listings.

Another alternative from a good MN vendor:

https://www.denniskirk.com/parts-unlimited/klg-plug-caps-98.p2068.prd/2068.sku

....Non-resistor and the terminal designed to use the ferrule that threads on the spark plug

They might be the place I buy from Thanks !!
Hell if there in MN why not

 

[Mikey]

But there is resistance in the circuit. At least there should be. If you use the non-resistor caps, you run resistor plugs. There's your resistance.

Yep and your diagram makes it a no argument case too
Thanks!!

 

[Jim]

The NGK caps can be confusing and their suppliers often add to that with incorrect listings.

That's why you ignore what the vendor says and go by the letters/numbers printed on the box... or more correctly, the cap itself.
Those numbers don't lie.... vendors do.

 

[Mikey]

But there is resistance in the circuit. At least there should be. If you use the non-resistor caps, you run resistor plugs. There's your resistance.

When I put in the NGK LZFH with the non resistor new wire from Dune buggy warehouse with the AP63's there should be no? resistance in the circuit yet the bike run fine as far as I can tell

 

[Jim]

When I put in the NGK LZFH with the non resistor new wire from Dune buggy warehouse with the AP63's there should be no? resistance in the circuit yet the bike run fine as far as I can tell

The AP63's are resistor plugs. They have 4kΩ's of resistance.

 

[Mikey]

When I put in the NGK LZFH with the non resistor new wire from Dune buggy warehouse with the AP63's there should be no? resistance in the circuit yet the bike run fine as far as I can tell

I've got resistor plugs coming and the old ones need to be changed so now at least I can be certain of resistance in the circuit
Diagrams printed and will go in my 3 ring binder

 

[Mikey]

The AP63's are resistor plugs. They have 4kΩ's of resistance.

Maybe thats why the bikes run good !
I was just under the assumption that they weren't resistor plugs the AP 63's

 

[Mikey]

The AP63's are resistor plugs. They have 4kΩ's of resistance.

I think when I didn't see an R as in APR 63 I thought they weren't resistor plugs
Thanks again guys !!!!!

 

[Jim]

I think when I didn't see an R as in APR 63 I thought they weren't resistor plugs

https://www.autolitesparkplugs.com/autolite-ap63-platinum-spark-plug

 

[5twins]

NGK puts an "R" in the part number of their resistor plugs but not all manufacturers do. I told you in your other thread that the AP63's were resistor plugs.