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This may help ....

stick with stock plugs.


Has been discussed many times, all non stock plugs either stick out to little or to far into the combustion area of the cylinderhead .

The NGK PFR6B-11C/PFR6B-11B plugs have been specifically designed for our engines.



(right one is a stock plug)

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Those in the know will tell you to avoid Iridium plugs in the zed !


Stick to NGK PFR6B-11C/PFR6B-11B , which are designed especially for the zed as other plugs are not the correct thread/electrode length .




(and they are cheaper than those ebay iridiums!)


Thanks Legrath. I really appreciate it. I am going to go for the ones you recommended.

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