NGK spark plug caps


Information and questions on GL1100 Goldwings (1980-1983)
  • Sponsored Links
tunaboy
Posts: 144
Joined: Sun Aug 05, 2012 8:46 pm
Location: Milwaukee, Wisconsin
Motorcycle: 1980GL1100 NICE!

NGK spark plug caps

Postby tunaboy » Sun Mar 17, 2013 6:52 am



I bought the replacement NGK caps and new wires for my 1100 and plan to put them on soon. The caps have a raised boss on the side of the cap that says NGK. I have read that to get the stock rubber boot to seal out water you need to shave off the boss flush with the body of the cap. Any idea as how to do this and not have it look cobby?



User avatar
SteveB123
Posts: 842
Joined: Thu Apr 05, 2012 9:29 am
Location: Winchester, Ontario, Canada
Motorcycle: 1982 1100I, 60A Poorboy, MSD coil

Re: NGK spark plug caps

Postby SteveB123 » Sun Mar 17, 2013 8:18 am

I'm using the side of a drill bit, chucked into my press, as a "milling maching". I've noted other threads were people say to just file it, but this stuff is pretty tough.
I'm not overly concerned about how it might looks, as all but the smallest portion is hidden by the boots.
Alternatively, leave it alone. Any water should follow the path out the drains.....any that doesn't, well, it IS a cylinder head. She'll boil it off.
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

User avatar
NKYWinger
Posts: 344
Joined: Sun Oct 02, 2011 6:37 pm
Location: Covington, KY
Motorcycle: 1983 GL1100A Aspencade
2003 GL1800

Re: NGK spark plug caps

Postby NKYWinger » Sun Mar 17, 2013 8:36 am

I, also, just replaced the spark plug caps; I chose NOT to remove the NGK logo from the side. I agree that any water that might find it's way down would simply go out the drain holes in the head.
--John--

FTCS(SS) USN Ret.
'83 GL1100 Aspy (SOLD)
'03 GL1800
'08 Lees-ure Lite
GWRRA 339547 KY - 'G'
DS# 1547

Thorgot
Posts: 11
Joined: Fri Aug 17, 2012 6:22 pm
Location: Mississauga, Ontario, Canada
Motorcycle: 1983 GL1100I Interstate

Re: NGK spark plug caps

Postby Thorgot » Mon Mar 18, 2013 6:16 pm

What model of plug caps did you get? I have an 1983 GL 1100. When checking here and other places I get mixed messages that the plug caps for early 1980 / 1981 are different than those for the 1982 / 1983' s.

I have a part number from the NGK Canada website that says the cap model # is XD05FP for all years of GL 1100.

Can anyone confirm the NGK cap model for a 1983?

Thanks

User avatar
NKYWinger
Posts: 344
Joined: Sun Oct 02, 2011 6:37 pm
Location: Covington, KY
Motorcycle: 1983 GL1100A Aspencade
2003 GL1800

Re: NGK spark plug caps

Postby NKYWinger » Mon Mar 18, 2013 6:52 pm

Thorgot=
That is the correct number for an '83. Might as well replace the plug wires (7mm solid core) while you're at it. Also give a thought to upgrading the coils using the CBR coil mod.,,,food for thought.
--John--

FTCS(SS) USN Ret.
'83 GL1100 Aspy (SOLD)
'03 GL1800
'08 Lees-ure Lite
GWRRA 339547 KY - 'G'
DS# 1547

dwight007fchr
Posts: 434
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: NGK spark plug caps

Postby dwight007fchr » Tue May 14, 2013 9:26 pm

Greetings. I have been trying to locate the reason for the "miss" in my 83 GL1100. I have been posting this under another thread also. Right now I have taken the coils off and wanted to test them and the plug wires too. I was under the impression that I would get "continuity" on the plug wires, but am getting nothing.

I was doing a bit of quick research, and learned that the old fashioned solid core (copper) plug wires were the best, but caused static on the radio. The graphite core wires wear out fast and have alot of resistance, and hence a weaker spark to the plug. I am thinking, "Shoot, I dont even use the radio or CB when I drive my Wing, so why not go with solid copper core plug wires?". Maybe this is why I am getting a "miss" while cruising......high resistance old plug wires. So, why not upgrade to the old fashioned copper type? I am thinking that a hotter spark is always better, and no need to worry about the carbon fibers breaking down with time.

Can anyone say if this will work on an 83 Wing? Are there any electronics that may have heart-burn with the EMF affects of the solid copper wires?

Thanks.
dwight

User avatar
NKYWinger
Posts: 344
Joined: Sun Oct 02, 2011 6:37 pm
Location: Covington, KY
Motorcycle: 1983 GL1100A Aspencade
2003 GL1800

Re: NGK spark plug caps

Postby NKYWinger » Wed May 15, 2013 6:02 am

dwight- you most likely already have solid core plug wires - the resistance (for radio interference) is in the caps, not the wires. I used high quality solid core wire and new NGK caps when I added the CBR coils; no radio interference, no intercom interference, no CB interference...
Go ahead and use solid core wire- if the caps are old, replace them as well. They are inexpensive.
Good luck!
--John--

FTCS(SS) USN Ret.
'83 GL1100 Aspy (SOLD)
'03 GL1800
'08 Lees-ure Lite
GWRRA 339547 KY - 'G'
DS# 1547

dwight007fchr
Posts: 434
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: NGK spark plug caps

Postby dwight007fchr » Wed May 15, 2013 7:01 am

NKYwinger......Well, when I do a continuity test on all the plug wires, I get nothing.......so, that is why I think they are not solid core, but the high resistance carbon types. So you are saying that the resistance is in the caps, not the wires. I suppose I can pull the wire loose from the cap and then do a continuity test on the wires, right?

Also, if I dont care about having resistance between my plugs and the coils, can I just delete the resistance caps and use some type of plug cap that has no resistance? I dont use the radio stuff when driving anyway. Wouldnt deleting the resistance give me a hotter spark, and better combustion?

dwight.

User avatar
NKYWinger
Posts: 344
Joined: Sun Oct 02, 2011 6:37 pm
Location: Covington, KY
Motorcycle: 1983 GL1100A Aspencade
2003 GL1800

Re: NGK spark plug caps

Postby NKYWinger » Wed May 15, 2013 10:35 am

OK; it is time for the ignition experts to chime in here:

:?: :?: :?: Should he use solid core wire and the NGK plug caps :?: :?: :?:

I do not think you lose anything (other than noise) by going with the resistance plug caps.
Someone else chime in with an opinion...
--John--

FTCS(SS) USN Ret.
'83 GL1100 Aspy (SOLD)
'03 GL1800
'08 Lees-ure Lite
GWRRA 339547 KY - 'G'
DS# 1547

dwight007fchr
Posts: 434
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: NGK spark plug caps

Postby dwight007fchr » Wed May 15, 2013 5:03 pm

NKY......where is Nicola Tesla when we need him????? Just seems that a solid copper (silver is even better if you have the dinero) wire running from the coil straight to the plug would allow those little electrons to zip on down to the tip spark gap with no interference whatsoever. From what I was reading, these resistance carbon/graphite type wires were invented to help take the poppity-popping noised out of the AM radios. Before that I think all cars had solid metal plug wires. I even saw a fellow-antique car restoration nut use "custom spark plug wires" in his Model T.......and these consisted of barbed wire from coils to plugs....pretty crazy, but the T ran like a top. Maybe I should try some barbed fence wire on my Wing and she how she likes that?

If I got a wild hair up where the sun doesnt shine, and I wanted to spearmint, then what harm would it be to use solid copper stranded or something like a No. 12 household wire and just give it a try? Maybe just put a little curly hoop on the end to fasten it to the plug......but a bit more complicated to rig it up to the coil end.....maybe use an old piece of the graphite plug wire and poke the copper straight thru the middle, and then I could use the coil caps to screw it in place.

Tesla....please speak up before I add a Flux Capacitor and go parking out near the clock tower.

dwight

User avatar
SteveB123
Posts: 842
Joined: Thu Apr 05, 2012 9:29 am
Location: Winchester, Ontario, Canada
Motorcycle: 1982 1100I, 60A Poorboy, MSD coil

Re: NGK spark plug caps

Postby SteveB123 » Wed May 15, 2013 5:27 pm

dwight007fchr wrote:. Wouldnt deleting the resistance give me a hotter spark, and better combustion?



Once there is enough voltage to jump the gap....well, that's it.
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

dwight007fchr
Posts: 434
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: NGK spark plug caps

Postby dwight007fchr » Wed May 15, 2013 7:48 pm

SteveB.......so, are you coaxing me to experiment with the No. 12 copper wire?

dwight

User avatar
SteveB123
Posts: 842
Joined: Thu Apr 05, 2012 9:29 am
Location: Winchester, Ontario, Canada
Motorcycle: 1982 1100I, 60A Poorboy, MSD coil

Re: NGK spark plug caps

Postby SteveB123 » Wed May 15, 2013 7:55 pm

dwight007fchr wrote:SteveB.......so, are you coaxing me to experiment with the No. 12 copper wire?

dwight


Nope.
It's been done. I see no advantage.
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

dwight007fchr
Posts: 434
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: NGK spark plug caps

Postby dwight007fchr » Thu May 16, 2013 6:22 am

Steve.....10-4. But bottom line I suppose is that solid copper core wires are better than the carbon fiber resistance type, only if you dont listen to your radio or cb while driving. The Goldwing electronics from the eary 80s will not have any heartburn with it from the comments I have seen. Still waiting for Tesla to chime in.

User avatar
SteveB123
Posts: 842
Joined: Thu Apr 05, 2012 9:29 am
Location: Winchester, Ontario, Canada
Motorcycle: 1982 1100I, 60A Poorboy, MSD coil

Re: NGK spark plug caps

Postby SteveB123 » Thu May 16, 2013 9:32 am

dwight007fchr wrote:Steve.....10-4. But bottom line I suppose is that solid copper core wires are better than the carbon fiber resistance type, only if you dont listen to your radio or cb while driving. The Goldwing electronics from the eary 80s will not have any heartburn with it from the comments I have seen. Still waiting for Tesla to chime in.


Stock wires are copper core.
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

User avatar
SteveB123
Posts: 842
Joined: Thu Apr 05, 2012 9:29 am
Location: Winchester, Ontario, Canada
Motorcycle: 1982 1100I, 60A Poorboy, MSD coil

Re: NGK spark plug caps

Postby SteveB123 » Thu May 16, 2013 9:34 am

dwight007fchr wrote: then what harm would it be to use solid copper stranded or something like a No. 12 household wire and just give it a try?


Not rated for the voltage.

Household use is (mostly) all about amp draw.
Ignition use is all about gap jumping voltage.
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

tunaboy
Posts: 144
Joined: Sun Aug 05, 2012 8:46 pm
Location: Milwaukee, Wisconsin
Motorcycle: 1980GL1100 NICE!

Re: NGK spark plug caps

Postby tunaboy » Thu May 16, 2013 3:08 pm

Hey, Tuna here and the caps that I used on my '80 1100 are NGK XD05FP's and I used the 7mm copper wires. Laced up the new caps and wires to stock coils. Stuck the plugs in the caps and laid them (4) on the heads and spun the starter. Good spark on all 4. Screwed in the plugs and the bike started as soon as the gas got to the carbs. Got lucky with a bench tune and I am not going to mess with the carbs. The only problems I had was a lightly plugged pilot on #3 (2 tanks of Seafoam to fix). Also had a gas cap that was not breathing that would cause a miss after a 20 mile ride. Another easy fix. Running great now. Need to Seafoam the crankcase and should be good to go. I plan to trim the arm on the plugs to get better spark. I will let you know how that works out.

dwight007fchr
Posts: 434
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: NGK spark plug caps

Postby dwight007fchr » Thu May 16, 2013 6:09 pm

SteveB......You are saying that stock Goldwing wires are infact copper core? I did not realize that, but thought they were the carbon/graphite types. You 100% sure? So, if I were to cut about an inch from the end of the plug wire, then I would see a small diameter copper wire running in the center? Also, is it conclusive that the plug caps have the resistance built in there?

dwight

dwight007fchr
Posts: 434
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: NGK spark plug caps

Postby dwight007fchr » Thu May 16, 2013 6:14 pm

tunaboy wrote:Hey, Tuna here and the caps that I used on my '80 1100 are NGK XD05FP's and I used the 7mm copper wires. Laced up the new caps and wires to stock coils. Stuck the plugs in the caps and laid them (4) on the heads and spun the starter. Good spark on all 4. Screwed in the plugs and the bike started as soon as the gas got to the carbs. Got lucky with a bench tune and I am not going to mess with the carbs. The only problems I had was a lightly plugged pilot on #3 (2 tanks of Seafoam to fix). Also had a gas cap that was not breathing that would cause a miss after a 20 mile ride. Another easy fix. Running great now. Need to Seafoam the crankcase and should be good to go. I plan to trim the arm on the plugs to get better spark. I will let you know how that works out.


TunayBoy......What exactly do you mean when you say "your gonna trim the arm on the plugs..."? Are you saying that you are going to clip off the spark plug caps and then somehow rig the copper wires straight to the plug top? Is this because the resistance feature is built in to these "arms"? Can you take some pics of all this and post it?

dwight

dwight007fchr
Posts: 434
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: NGK spark plug caps

Postby dwight007fchr » Thu May 16, 2013 6:23 pm

Hey Tuna......Since you are tinkering with the spark plug wires right now, can you do me a favor and put a test meter lead on one end of a new copper core wire, and the other test meter lead on the other end of the wire, and set the meter to continuity and tell me if the needle jumps to show you have current flow. Do this before you put the plug cap boots on one end, as they are saying the resistance is in these cap boots.

While you are at it, check continuity on the old wires.

thanks.
dwight

User avatar
SteveB123
Posts: 842
Joined: Thu Apr 05, 2012 9:29 am
Location: Winchester, Ontario, Canada
Motorcycle: 1982 1100I, 60A Poorboy, MSD coil

Re: NGK spark plug caps

Postby SteveB123 » Thu May 16, 2013 7:31 pm

dwight007fchr wrote:SteveB......You are saying that stock Goldwing wires are infact copper core? I did not realize that, but thought they were the carbon/graphite types. You 100% sure? So, if I were to cut about an inch from the end of the plug wire, then I would see a small diameter copper wire running in the center? Also, is it conclusive that the plug caps have the resistance built in there?

dwight


I am.
No, they're not.
I am.
Yes, you'd see multiple small strands of copper.
Yes.

The caps unscrew off of the wires. The plug end "clip" unscrews from inside the cap. You'll find a resistor there. Just for you, I rummaged through the garbage can in the shop, stripped a bit off a old wire, and took apart an old end cap.
Walla.


Inside the wire end of the cap, is a small brass screw that pierces the end of the plug wire, and contacts the centre conductor.


Seriously, would you run 30 year old plug wires on a car? Of course not, you'd bin them as soon as you could.
Do your bike a favour, and light the fire.

7mm wire, with 90 degree HEI (to match new MSD Neon coil) coil boots. Wizzbang crimpers borrowed from speed shop for free (!). As before the new wire caps screw on.


All tucked in with new coil, and coil relay direct from battery. A coil is a voltage multiplier, so higher in, equals higher out.


Hope this helps.
cheers
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

dwight007fchr
Posts: 434
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: NGK spark plug caps

Postby dwight007fchr » Thu May 16, 2013 8:38 pm

SteveB........You tha Man! Boy, you went all out in your reply.....very well done! Now I fully see what this "resistor" actually is down in the plug boot.

Regarding age of the plug wires on my 83 Wing, I am pretty sure that they were replaced by the prior 2 owners, and I was thinking that maybe they had used the non-copper core type. When I take my knife to the end of one, I will know for sure.

Ok, you used the 90 degree HEI coil boots on the one end......did you reuse the Honda plug boot with that wascully little resistor, or did you ditch the resistor? (You may have already said in a prior comment, but my memory fails me).

Where did you locate the hot coil that would give Tesla a **** grin? Your configuration is the way to go, especially if the old coils are failing.

Thanks for the detailed pics.
dwight

tunaboy
Posts: 144
Joined: Sun Aug 05, 2012 8:46 pm
Location: Milwaukee, Wisconsin
Motorcycle: 1980GL1100 NICE!

Re: NGK spark plug caps

Postby tunaboy » Thu May 16, 2013 8:46 pm

Check out the how to section here at GWD. You will find one called "improving spark plug performance"
It looks interesting. My only concern it that after you modify the plugs you are told to reduce the gap by .010 from stock. Since the gap is less won't the spark be weaker because it jumps a smaller distance?

User avatar
SteveB123
Posts: 842
Joined: Thu Apr 05, 2012 9:29 am
Location: Winchester, Ontario, Canada
Motorcycle: 1982 1100I, 60A Poorboy, MSD coil

Re: NGK spark plug caps

Postby SteveB123 » Thu May 16, 2013 8:47 pm

dwight007fchr wrote:Ok, you used the 90 degree HEI coil boots on the one end......did you reuse the Honda plug boot with that wascully little resistor, or did you ditch the resistor? (You may have already said in a prior comment, but my memory fails me).

Where did you locate the hot coil that would give Tesla a **** grin? Your configuration is the way to go, especially if the old coils are failing.
dwight


New OEM-spec NGK plug boots (they're only ~$5 each). Same speed shop that I got the wires and boots from, also sourced the coil for me.
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

User avatar
LittleGoldy
Posts: 31
Joined: Sun Jul 26, 2015 11:41 pm
Location: Lake Worth FL
Motorcycle: 1983 GL1100, 1982 GL100 Aspencade (parts bike, ugh got shafted on ebay) 1983 XJ750 Seca Sold, 2003 Kawasaki ZX1R Sold, 1980 GS750E Sold, 1973 Kawasaki H1 Triple 500 (first bike ever) Sold

Re: NGK spark plug caps

Postby LittleGoldy » Fri Apr 29, 2016 3:53 pm

Something Borrowed/ Something NEW ( for some of us maybe)
Platinum and Iridium Spark plugs
Regarding the use of platinum and iridium spark plugs in a Ducati: (may be advisable for ANY BIKE )

Platinum or iridium plugs will give you worse performance than a conventional plug unless you use a larger gap than is recommended for the steel electrode plug equivalent. One by-product (and benefit) to having platinum or iridium as an electrode material is that the harder material erodes more slowly and consequently allows you to reduce the size of the center electrode and still have a long-lifetime plug. Re-gapping is infrequent or eliminated. In fact, the initial reason this type of plug was developed was an attempt to meet the 100,000-mile durability/maintenance requirement mandated by the US EPA for exhaust emissions, not because they offered any improved performance over conventional electrodes.

A smaller electrode, however, will arc at a lower voltage. This is good because the lower arc-over voltage is not as demanding on your less-than-new ignition coils and wires so the firing is more reliable. But this is also bad because a lower arc-over voltage presents a weaker spark kernel (lower arc current and duration) that is less likely to light off the air/fuel mixture.

Consequently, dyno testing shows a performance gain with specialty plugs only when their intrinsically lower arc-over voltage has allowed users to increase the plug gap above that possible with conventional steel electrode plugs. A larger plug gap needs a higher arc-over voltage to fire, and a larger gap, combined with good plug wires and coils, will span more fuel molecules resulting in a more reliable burn with fewer misfires. So you get better throttle response. Not more power mind you, better throttle response.

The transition between throttle positions involves a wide range of fuel/air mixtures and the ability to fire these less-than-ideal mixtures with a minimum of misfires is what throttle response is all about.

When it comes to spark plug gaps, bigger IS better. The larger the spark kernel that is generated by a spark jumping the electrode gap, the more likely and complete the fuel burn will be, and the smoother the engine will run. That is, the larger the spark gap that’s exposed to the air/fuel mixture, the easier it is to initiate combustion. This translates directly into improved throttle response.

Conversely, I have seen several examples of Ducati throttle response problems cured by replacing platinum/iridium plugs that were gapped too small (i.e. the 0.024 in. Ducati recommends for conventional plugs.) Both NGK and Denso pre-gap their Ducati application specialty plugs to 0.035 in. This should be considered a minimum gap for this kind of plug.

If you have a older bike, you may arc-over the plug wires before you can fire an optimized larger plug gap. If the spark plug wires have inadequate insulation, the wire cannot maintain a high enough voltage across the insulation and will arc to ground before firing the plug gap. The factory spark plug leads are stranded wire covered with an EPDM jacket and although the wire itself will last a long time, the insulating jacket will start to break down after a couple of years which is why most good aftermarket wire is insulated with silicone.

If this becomes a problem, replace the stock spark plug wires with a set of Magnecor or similar quality wires. This will allow running a larger plug gap without a concern for insulating the higher voltage needed to jump the gap.

For street bikes, you should use carbon core wires, preferably carbon wires with a spiral wrap center conductor. Straight, multi-stranded, unshielded wire conductors offer theoretical gains resistance-wise, but produce lots of electromagnetic interference (EMI). One major concern is with the computer found used on fuel injected bikes since the radiated EMI can interfere with the computer and corrupt sensor and internal signals which can affect engine performance and reliability. This concern also extends to the use of non-resistor type spark plugs.

APPLAUSE AND SALUTATIONS TO SteveB123 FOR THAT GREAT WRITE UP AND PICS :D


You can do anything, but not everything.
Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away. :ugeek:


Return to “GL1100 Information & Questions”




Who is online

Users browsing this forum: No registered users and 2 guests