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#248668 - 04/16/09 1:58 pm Spark plug question on NGK B8EGV  
Joined: Nov 2008
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desco Online content
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desco  Online Content
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Bishop, Calif.
68 and 72 T120
Stock calls for Champion N3C or NGKB8ES depending on which conversion chart you are using. I recently installed a set of NGKB8EGV's in the 68 and the improvement was instantly noticeable.
G = gold palladium & V = very fine wire electrode.
Quicker throttle response, more horse power and louder exhaust.
They virtually cured the high altitude sickness I was experiencing on the 68 with it's new Mega Cycle cams.
At $9 each they are not cheap but with all the gains I would pay twice that much.
I guess I'm afraid they are too much of a good thing. Am I looking at a problem down the road?


Last edited by desco; 04/16/09 2:02 pm. Reason: clarity

1968 T120R
1972 T120RV
Any advice given is without a warranty expressed or implied.
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#248695 - 04/16/09 4:31 pm Re: Spark plug question on NGK B8EGV [Re: desco]  
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RF Whatley Offline
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RF Whatley  Offline
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North Georgia, USA
No doubt that new plugs, especially those easier-to-fire small electrode models, cleaned up some of your ignition issues. However, IMHO the "8" heat range is too cold and these too will shortly soot up. I know B8 is what NGK says on-line, but I believe that is wrong. I mean it's not like their going to go look for 30 year old motorcycles to verify each of their millions of spark plug specifications, is it? I can tell you from experience that from 1968 until well into the 80's NGK always specified B7's for all Brit bikes.


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA

"Shop Boy" at Rodi British Bikes
#248699 - 04/16/09 4:57 pm Re: Spark plug question on NGK B8EGV [Re: RF Whatley]  
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desco Online content
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desco  Online Content
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Bishop, Calif.
Thanks RF.
The plugs are a bit sooty and I was trying to lean out the mixture. The high country has been closed to me for a couple of weeks, wind & snow, so I have been unable to do any testing. Will pick up some 7's today. Supposed to be in the 80's down here in town next week, c'mon spring.
Thanks also to you and JH for the Boyer diagnostics site. I was able to coble together two good units out of the three I had on hand.


1968 T120R
1972 T120RV
Any advice given is without a warranty expressed or implied.
#248722 - 04/16/09 7:11 pm Re: Spark plug question on NGK B8EGV [Re: desco]  
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Ducknaldo Offline
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Denmark
So Whatley, are you suggesting B7EGV or better stick with B7ES?
Iīm not experiencing any problems, but it might be worth a try if it worked well for Desco.
The price is the same where I found them.


*******************
Run `em...
*******************
1969 T120
#248759 - 04/16/09 9:36 pm Re: Spark plug question on NGK B8EGV [Re: Ducknaldo]  
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desco Online content
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desco  Online Content
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Bishop, Calif.
Ducknaldo,
I have not been able to find the B7EGV's in the U.S. Or any other fine wire plugs in the correct heat range for that matter. The 8's may be too cold but made a HUGE improvement.


1968 T120R
1972 T120RV
Any advice given is without a warranty expressed or implied.
#248858 - 04/17/09 2:37 pm Re: Spark plug question on NGK B8EGV [Re: desco]  
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Ducknaldo Offline
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Denmark
Desco
Maybe they are hard to find in the states, dont know about that.
I found them, right after reading this thread, on a german web shop, they deliver to the states also.
19 EURO, same price as b7es, thatīs around 26 USD.
Dont know about shipping prices, but if you cant find them in the states, that may be your only option.
Sunstop shop
If you need help with translation, let me know.


*******************
Run `em...
*******************
1969 T120
#248897 - 04/17/09 8:09 pm Re: Spark plug question on NGK B8EGV [Re: Ducknaldo]  
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triton thrasher Online content
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triton thrasher  Online Content
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scotland
They're old hat, now that they have iridium plugs.


Amateur Loctite enthusiast.
#248898 - 04/17/09 8:15 pm Re: Spark plug question on NGK B8EGV [Re: triton thrasher]  
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Ducknaldo Offline
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Denmark
So whatīs the deal about iridium plugs?


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Run `em...
*******************
1969 T120
#248906 - 04/17/09 10:13 pm Re: Spark plug question on NGK B8EGV [Re: Ducknaldo]  
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desco Online content
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desco  Online Content
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Bishop, Calif.
Google"DENSO Iridium" and prepare to be educated. Great web site.
They recommend an IW24 to replace an N3 or N4 but, they call for a IW22 for a Norton, the Triumph button causes a crash.
I know nothing of Norton's and I can't figure out what the W means. The 22 is hotter than a 24.


1968 T120R
1972 T120RV
Any advice given is without a warranty expressed or implied.
#248910 - 04/17/09 10:40 pm Re: Spark plug question on NGK B8EGV [Re: desco]  
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desco Online content
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Bishop, Calif.
Bingo!!!
By working with NGK numbers I found the replacement for a B7ES is a IW22. Still don't know what the W is for.


1968 T120R
1972 T120RV
Any advice given is without a warranty expressed or implied.
#248914 - 04/17/09 11:01 pm Re: Spark plug question on NGK B8EGV [Re: desco]  
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Ducknaldo Offline
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Denmark
The german website also offers these IW22 and UW24 plugs at the same price as B7EGV.
Has anyone tried out these plugs?


*******************
Run `em...
*******************
1969 T120
#248916 - 04/17/09 11:14 pm Re: Spark plug question on NGK B8EGV [Re: Ducknaldo]  
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desco Online content
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Bishop, Calif.
No one within 150 miles of me sells DENSO. I will have to get them on line. They are 11.20 USD. EACH. I am going to have to get a job real soon.
The B8EGV's turned my 68 into a rocket and they were one size too cold. Probably the single best improvement I have made, and the easiest.
No warranty expressed or implied.


1968 T120R
1972 T120RV
Any advice given is without a warranty expressed or implied.
#248918 - 04/17/09 11:25 pm Re: Spark plug question on NGK B8EGV [Re: triton thrasher]  
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Britbodger R.I.P. Offline
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Houston Texas
Does NGK have an iridium plug that is non-resistor type?

P.S My "old hat" NGK B8EGV plugs work great in my R3 but they don't seem to be available anymore.

#248921 - 04/17/09 11:38 pm Re: Spark plug question on NGK B8EGV [Re: Britbodger R.I.P.]  
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desco Online content
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Not that I've found. That's why I need to find out what the W means on the DENSO. I can't make the explanation chart on their website work. I have emailed them about the W with no reply.
If the DENSO's work I'll stick them in the 72 also.


1968 T120R
1972 T120RV
Any advice given is without a warranty expressed or implied.
#248926 - 04/18/09 12:15 am Re: Spark plug question on NGK B8EGV [Re: desco]  
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GaCracker Offline
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Johns Creek,Ga
Originally Posted By: desco

The B8EGV's turned my 68 into a rocket and they were one size too cold. Probably the single best improvement I have made, and the easiest.
Desco, keep this under your hat. Don't let them BSA or Norton sumbitches find out. Greg


72 TR6RV
2004 Thruxton
#248932 - 04/18/09 2:12 am Re: Spark plug question on NGK B8EGV [Re: GaCracker]  
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desco Online content
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Bishop, Calif.
The W stands for 14mm. If there is not an R , and there is none, it's non resister. God bless the internet.
Iridium is the dust left over from the asteroid that destroyed the dinosaurs. How ironic, that it is what causes their remains to burn better.


1968 T120R
1972 T120RV
Any advice given is without a warranty expressed or implied.
#248942 - 04/18/09 4:18 am Re: Spark plug question on NGK B8EGV [Re: RF Whatley]  
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NZbiker Offline
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NEW ZEALAND
I agree that the B8ES is to cold. I have a 1968 T120 I moved to B7ES and had a better run but even these fouled but not as quickly. Went to the Iridium equivelent of the 8 as I couldnt get the 7 these lasted a lot longer but still ended up fouling
I am currently trying Champion N4C and they do seem to burn cleaner
Hope this is of some help

Cheers

#248946 - 04/18/09 5:53 am Re: Spark plug question on NGK B8EGV [Re: GaCracker]  
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Ducknaldo Offline
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Denmark
Originally Posted By: GaCracker
Originally Posted By: desco

The B8EGV's turned my 68 into a rocket and they were one size too cold. Probably the single best improvement I have made, and the easiest.
Desco, keep this under your hat. Don't let them BSA or Norton sumbitches find out. Greg

Could be a Rocket 3 laugh


*******************
Run `em...
*******************
1969 T120
#249912 - 04/23/09 12:41 pm Re: Spark plug question on NGK B8EGV [Re: desco]  
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Ducknaldo Offline
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Denmark
I got a pair of Denso IW22 Iridium plugs today.
On the packet it says, 5 Kohm resistor.
Does this mean I cant use these plugs with my Boyer?


*******************
Run `em...
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1969 T120
#249932 - 04/23/09 3:51 pm Re: Spark plug question on NGK B8EGV [Re: Ducknaldo]  
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Terry_tr6 Offline
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Melbourne Fl
Analog or digital? I know the analog doesn't care, but the digital may need them. I know the SPARKZ voltage regulator needs them, but the podtronics regulator i replaced it with (when it soon died) says it dosen't care. My gut says your electronics either needs the 5k resistor or doesn't care one way or another

#249942 - 04/23/09 4:50 pm Re: Spark plug question on NGK B8EGV [Re: Terry_tr6]  
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Ducknaldo Offline
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Denmark
Its an analog Boyer.
Iīll try it out unless somebody drops by here and tell me that I could be heading for trouble:)


*******************
Run `em...
*******************
1969 T120
#250144 - 04/24/09 7:43 pm Re: Spark plug question on NGK B8EGV [Re: Ducknaldo]  
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pillgrimm13 Offline
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queensburry ny usa
i just replaced my ngk b7es plugs with ngk breix iridium plugs in my trident before the winter. i wasnt sure if the iriduim plugs in the 7 heat range would be to hot and harm the engine. the plugs do get a little sooty so far but they are alot better then the b7es.i also plan to go to an electronic ignition when i can afford one but i dont know to much about plugs, does anybody know if the iridium 7s would be ok?


1975 Triumph T160 Trident
1969 BSA A65t Thunderbolt
1978 Honda CB750 basketcase
#250201 - 04/25/09 3:31 am Re: Spark plug question on NGK B8EGV [Re: pillgrimm13]  
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Tiger Offline
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Melbourne Australia
My TR6 runs fine on BR8E1X Iridiums and has done so for a couple of years, I still keep a couple of B7ES aboard though.


1969 TR6R
7.62 x 51 is not a maths puzzle.
#250211 - 04/25/09 9:06 am Re: Spark plug question on NGK B8EGV [Re: Ducknaldo]  
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triton thrasher Online content
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triton thrasher  Online Content
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scotland
Originally Posted By: Ducknaldo
I got a pair of Denso IW22 Iridium plugs today.
On the packet it says, 5 Kohm resistor.
Does this mean I cant use these plugs with my boyer?


You've jogged my memory. Something makes me think there was a discrepancy between the packet and the actual plug on some Densos I've had.

5kohm of resistance will not spoil a points or electronic igntion in any way and might improve spark performance.

5kohm might have a bad effect on a magneto system: lots of people say it does. But I've used 5kohm caps with a magneto and could detect no difference from resistorless systems.


Amateur Loctite enthusiast.
#250240 - 04/25/09 1:40 pm Re: Spark plug question on NGK B8EGV [Re: triton thrasher]  
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dave jones Offline
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dave jones  Offline
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Emsworth, sunny south of Engla...
Triton- I can't see how a resistor would improve the spark on a points system. Surely it can only make the spark weaker because it is causing less current to pass.

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