Ruthenium spark plugs?

[hulkss]

I ordered a set of these plugs from Weblike: https://japan.webike.net/products/24037277.html
Info from NGK attached. You will need to get terminal nuts for the top of the spark plugs. Denso or NGK nuts will fit, m4 thread.
I found the cross reference to these here: https://japansparkplugs.com/boutique/en/search?controller=search&orderby=price&orderway=asc&search_query=cpr8eb-9&submit_search=

Here's a pic from another purchaser. They appear to be "projected" as the OEM plugs are.

 

[Jlq1969]

Interesting…the DX model seems to have some design improvements over a common Iridium plug.

 

[MileageMonster]

Please keep us informed…

 

[Jlq1969]

It's all in Chinese, but it seems that the electrode will cool better with the intake air, and that the deflagration of the flame is more uniform


The only thing I have learned to read in Chinese, are these words……

 

[WJBertrand]

Not an expert but regarding the spark plugs, isn’t that Japanese, not Chinese?


Sent from my iPhone using Tapatalk Pro

 

[hulkss]

Check out the attachment in the original post.

 

[Don in Lodi]

Seems like an extreme over kill for a plug that folks seem to want to change so very often.

 

[hulkss]

Seems like an extreme over kill for a plug that folks seem to want to change so very often.

My plan is to put these in and leave them in for 50,000 miles or so. There is also evidence that they do provide superior fuel ignition as compared to the stock standard plugs.

 

[hulkss]

They really do exist:

 

[Bose]

My plan is to put these in and leave them in for 50,000 miles or so. There is also evidence that they do provide superior fuel ignition as compared to the stock standard plugs.

So your going to buy and fit and leave for 50k ?? Are these new plugs that amazing that they don’t require the normal service interval replacement of every 12k

 

[pooh and xtine]

I think that modern spark plugs hardly ever need changing - they seem to last forever! I've never changed any. It's generally expected that they last 80k+ miles in cars.

 

[Bose]

They really do exist:

View attachment 89656
View attachment 89657

What gap are you going to set with feeler gauge?? Yamaha spec from the handbook?? Or different gap distance.

 

[Bose]

I think that modern spark plugs hardly ever need changing - they seem to last forever! I've never changed any. It's generally expected that they last 80k+ miles in cars.

Maybe so with modern iridium plugs in cars , but we’re talking motorcycle plugs here that have a higher rev range , and suffer a lot more abuse as a plug compared to most cars that don’t ever get above 5,000rpm .
Im all for less maintenance an cost

 

[cyclemike4]

Over the years only my dirt bikes are about the only thing I noticed any difference in the way they ran with one plug or another. Oddly enough they were two stroke bikes from Japan and all of them ran better with Champion than NGK. Champion was easer and way cheaper to get so that didn't bother me. As the four stroke engines went I really couldn't tell one plug from another. If the threads fit and it sparked they ran fine. I am not a stickler for changing plugs either. I am sure it is the proper way of doing things and once the crush seal is mashed you are not supposed to use them again but I do. I don't turn my street engines real hard for very long periods at all. My FJ1200 had 120,000 miles before I changed the plugs. they were ok but worn. My FJR 1300 has 70,000 on the original plugs and my Super T has 90,000 miles on the plugs. I have a set ready to go in next time I am in there doing something. The super T seems to be harder on plugs than the other bikes as far as looking at the wear on them. Here is a odd note on the dirt bikes! My YZ250 will not run on a fouled plug. I will pull it out put in a new plug and it is fine. I put the fouled plug from the yz in my IT200 fire it up and give it a few really good revs and it has cleaned up and running great in that bike. I can put that plug back in the yz and it will start and run but not be like a new plug. So a fouled plug in one bike is a decent plug in another one.

 

[Jlq1969]

Over the years only my dirt bikes are about the only thing I noticed any difference in the way they ran with one plug or another. Oddly enough they were two stroke bikes from Japan and all of them ran better with Champion than NGK. Champion was easer and way cheaper to get so that didn't bother me. As the four stroke engines went I really couldn't tell one plug from another. If the threads fit and it sparked they ran fine. I am not a stickler for changing plugs either. I am sure it is the proper way of doing things and once the crush seal is mashed you are not supposed to use them again but I do. I don't turn my street engines real hard for very long periods at all. My FJ1200 had 120,000 miles before I changed the plugs. they were ok but worn. My FJR 1300 has 70,000 on the original plugs and my Super T has 90,000 miles on the plugs. I have a set ready to go in next time I am in there doing something. The super T seems to be harder on plugs than the other bikes as far as looking at the wear on them. Here is a odd note on the dirt bikes! My YZ250 will not run on a fouled plug. I will pull it out put in a new plug and it is fine. I put the fouled plug from the yz in my IT200 fire it up and give it a few really good revs and it has cleaned up and running great in that bike. I can put that plug back in the yz and it will start and run but not be like a new plug. So a fouled plug in one bike is a decent plug in another one.

The idea of putting iridium spark plugs in the S10 is also related to thinking about others. For example, if you are married, you separate, and your ex-wife keeps the S10, the new boyfriend who uses it with her, will surely have no idea about the maintenance of the S10, then you can rest assured that at least he will not need change the spark plugs for many more miles

 

[hulkss]

Maybe so with modern iridium plugs in cars , but we’re talking motorcycle plugs here that have a higher rev range , and suffer a lot more abuse as a plug compared to most cars that don’t ever get above 5,000rpm .
Im all for less maintenance an cost

The plugs in the ST do spark more often, but with less abuse than a typical car. Many cars and trucks these days have turbocharged engines with more cylinder pressure and heat then the ST. My car has a 2.0 liter turbo charged engine with 265 HP.

I will look at the Ruthenium plugs at 50,000 miles and I'm betting that they will go right back into the engine.

The advantage of these spark plugs that I am looking for is the superior ignition and resulting flame front in the cylinder. I expect the engine to run better at any trouble spots. If it's running good with stock plugs there will be little difference with new plugs.