plug cap resistance variation

[desert_indian]

Out of 8 caps, the best 4 were-
5500 ohms x3
6300 ohms x1

I think the 3 5500's will be ok, but will the one that's a little higher cause me any problems? Are those little resistors available? I'd rather do that than buy a new set of boots.

Thanks

[Casper]

The 'normal' for the GL1000 is a nominal 5,000 Ohms, and they do tend to go up with time. At 6300 I do not think you would see a serious issue, but it would indeed reduce the spark current flow, it will not change the voltage. But the 6300 Ohms will probably just get worse, that is higher, over time. Randakk sells a full set of 4 brand new NKG 5K caps for 31 Bucks, it you can swing it, it is a good way to go. I have personally not seen the small resistors for sale, but that does not mean you could not find them.

[desert_indian]

That's a good explanation. Thank you. I could swing a new set, I just feel like this old bikes been nickel and dimeing lately if you know what I mean, so I wanted to work around it if I could.

[CYBORG]

I have the resistors if you wind up needing them

[mrtwowheel]

O'rielly's has NGK caps for less than $3 each, special order, free shipping. Online part numbers, descriptions and pictures are wrong, but the right O'rielly part number can be found in the NGK book at the store.

Scott

[desert_indian]

Thank you Scott. I'll check that out. Cyborg, thanks for the offer. If I go that route I will let you know. If I can get the caps for a few bucks each I'll probably go that route.

[CYBORG]

$3 caps sound sound like a good deal

[mrtwowheel]

I've taken a few of these resistor NGK caps apart and have found that the rise in resistance is caused by the corrosion deep inside the cap, the innermost connection where the resistor connects to the cap. This corrosion can be so bad that removing the resistor and then replacing the resistor causes the resistor to connect to an even more corroded place inside the cap resulting in no connection at all. Yeah, they can be cleaned, but I have found the corrosion to be so severe that a new cap is still the best way to go. Counting the resistor itself, there are seven different connections being made inside these caps. Seven different connections able to corrode, carbon up and fail.

Scott

[scootsx2]

I've taken a few of these resistor NGK caps apart and have found that the rise in resistance is caused by the corrosion deep inside the cap, the innermost connection where the resistor connects to the cap. This corrosion can be so bad that removing the resistor and then replacing the resistor causes the resistor to connect to an even more corroded place inside the cap resulting in no connection at all. Yeah, they can be cleaned, but I have found the corrosion to be so severe that a new cap is still the best way to go. Counting the resistor itself, there are seven different connections being made inside these caps. Seven different connections able to corrode, carbon up and fail.

+1

[Casper]

O'rielly's has NGK caps for less than $3 each, special order, free shipping. Online part numbers, descriptions and pictures are wrong, but the right O'rielly part number can be found in the NGK book at the store.

Scott

Wow, that is one smoking good deal.

[CYBORG]

Smok'in good. Let us know how that works out for you

[mrtwowheel]

Found my notes on the NGK caps. NGK XD05F plug caps at O'reilly's is part # 8072, $2.79 each. Searching this part number on O'reillys website shows a 90* plug cap in their picture, but according to the NGK book in the store, 8072 is a 102*, 5K ohm, plug thread 10-12 mm, terminal stud cap. Like I said, go by their book and not the website.

Scott

[desert_indian]

I'll order them at the counter and let you know how it goes.

[desert_indian]

I ordered them. $2.09 each, HOWEVER, this is a non-stocking item. That means the sell them directly from NGK, and don't carry them at the store or the warehouse. Sooooooo......

2.09 x 4
4.00 service charge for a non-stock item
5.00 shipping

Basically they're ordering them from NGK for you, and charging you $4.00 to do it.
$17 for a set of four still isn't too bad.

[mrtwowheel]

Not a great deal, but not a bad deal. I'm not ready for mine yet, lots of painting and powder coat to do when the weather breaks, but I'm curious now to see if I get a different total. I may stop in to the store tomorrow morning to see. I'll have four big old Honda's to ride this year and the '75 will be ready for its 40th birthday.

Scott