[re-rider]

PROBLEM!
I have purchased a Bosch YR7MES and a Bosch YR7NII33S spark plugs to carry as spares, but on receiving the plugs I found the top thread was not exposed like the one fitted to my Supernova, so I attempted to remove the cap, which on most plugs usually screws off to expose the thread, but on using some force I found the plugs do not have a removable cap, and destroyed both plugs by separating the core. Has anyone else come across this problem as I haven't got a clue what the remedy is. Anyone know the equivalent plugs i.e. NGK, Champion etc. 

[tooseevee]

PROBLEM!
I have purchased a Bosch YR7MES and a Bosch YR7NII33S spark plugs to carry as spares, but on receiving the plugs I found the top thread was not exposed like the one fitted to my Supernova, so I attempted to remove the cap, which on most plugs usually screws off to expose the thread, but on using some force I found the plugs do not have a removable cap, and destroyed both plugs by separating the core. Has anyone else come across this problem as I haven't got a clue what the remedy is. Anyone know the equivalent plugs i.e. NGK, Champion etc.

           There are many cross reference charts available all over the internet. You can easily find a match in a Champion or Autolite or a lot of other good plugs.  I've never come across any of these plugs that won't unscrew in my whole life. Where are they coming from?

[Dexter]

           There are many cross reference charts available all over the internet. You can easily find a match in a Champion or Autolite or a lot of other good plugs.  I've never come across any of these plugs that won't unscrew in my whole life. Where are they coming from?

I just did a search for a cross reference to this Bosch plug and came up empty. No site that I found recognizes a Bosch YR7MES. Anyone else do better?

BTW - I have never carried a spare spark plug in my life time of riding and never needed one.

[tooseevee]

I just did a search for a cross reference to this Bosch plug and came up empty. No site that I found recognizes a Bosch YR7MES. Anyone else do better?

BTW - I have never carried a spare spark plug in my life time of riding and never needed one.

          I believe that plug (Torch YR7MES) is a Chinese made ripoff of Bosch plugs.

          OR they're made in the Chinese Bosch factory. The brand name in China is Torch.
 
          That may or may not be why they're not in the cross reference charts.

           You can't assume where ANYthing is made nowadays.

https://europe.autonews.com/article/20110920/ANE/110929997/bosch-begins-building-spark-plug-plant-in-china

         

 

[GSS]

Tooseevee, nice info on the Torch plugs being similar to the Bosch YR7MES….may help us eventually narrow down the search. Hoping that HCM will get us there first with a NGK offering. 

[Dexter]

Tooseevee, nice info on the Torch plugs being similar to the Bosch YR7MES….may help us eventually narrow down the search. Hoping that HCM will get us there first with a NGK offering.

I have searched using Torch and got no where.

[GSS]

I have searched using Torch and got no where.

+1

[tooseevee]

I have searched using Torch and got no where.

    Here's a clue:

https://www.aliexpress.com/item/32854267825.html

    You can do some more digging if you want.

     It doesn't surprise me at all that there are no (or very rare) cross-reference charts for this plug.

[glencoeman]

Why are people looking for spare spark plugs? New spark plugs for the Meteor are not even recommended till the 12,000 mile service even though the old ones would still be OK. It's early days folks, so wait a while and NGK etc will start making spark plugs suitable for the Meteor, if you really want a spare. 

[Dexter]

Why are people looking for spare spark plugs? New spark plugs for the Meteor are not even recommended till the 12,000 mile service even though the old ones would still be OK. It's early days folks, so wait a while and NGK etc will start making spark plugs suitable for the Meteor, if you really want a spare.

Other than the OP, who is looking to carry a spare plug, I think the rest of us were just looking for curiosity's sake, trying to help the OP out in his quest. It would be nice to know if there is a NGK substitute for future needs, but that doesn't appear to be the case at this point.

As for me, I typically keep spark plugs in service for at least 30,000 miles. If one went with iridium plugs, they can do 100,000 miles no problem.

[GSS]

It is our incessant quest for knowledge 

In all seriousness, while the OEM Bosch plugs are fine, the NGKs have successfully been used on this forum for settling down minor issues with the UCEs and other engines, especially after any performance modifications. It will be good to have alternatives identified in advance. Thanks.

[GSS]

Y - M12x1.25, 16 mm socket
R - With interference suppression resistor
7 - Heat range
M - see photo for dimensions
E - Nickel yttrium
S - 0.7 gap

[xpop]

so I attempted to remove the cap, which on most plugs usually screws off to expose the thread, but on using some force I found the plugs do not have a removable cap, and destroyed both plugs by separating the core. 

Hello Re-Rider, sometimes the cap is sealed with the spark, for example Champion has 3 cap's type:

[usasmartindian]

Y - M12x1.25, 16 mm socket
R - With interference suppression resistor
7 - Heat range
M - see photo for dimensions
E - Nickel yttrium
S - 0.7 gap

Excellent information my friend. with this can nail down on the type. Even though something similar is available in NGK the terminal nut is fixed and cannot be removed. Is there any way we can just change the ignition coil wire for Meteor 350 to accommodate SP terminal nut. then lot of SP are available with these specifications.

[GSS]

Thank you. I have found 7-8 alternative plugs. A majority have a solid terminal instead of the threaded stud. It should be pretty easy to change the spark plug cap to match the plug.