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Modern spark plugs for PI engine...


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Hey all,

I'm pretty sure that standard spark plugs for PI engines were Champion N9Y or N12Y.

I've used N9YC and NGK BP6ES in the past, but am wondering if there's a modern alternative (better performance and longevity) that people have used and would recommend.

Thanks 🙂

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In my experience PI engines (and other Triumph engines) like the triple (or quadruple) electrode plugs.

I like the Bosch WR7DTC (resistive, but I need them due to ECU).  Not sure if if the non-resistive W7DTC are still available.  NGK also do triple electrode.

Never had much joy with the fancy ultra-pointy exotics


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