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Spark Plugs

Robert Watson

Well Known and Active Website User
VOC Member
I suppose this could be asked in both pre and post war headings.

I have been running NGK B6HS plugs on both a Lucas mag and an new BT-H CDI ignition with Zero issues. I would like to know what an equivalent is in a 10mm plug (1/2 in reach).

Any thoughts??

Robert Watson

Well Known and Active Website User
VOC Member
I got that. I am switching heads and the new heads have 10mm plug holes so need to switch plugs from 14 mm to 10 mm. I tried looking for C6hS and kept getting no results and I didn't have the NGK catalogue number, which I now find as 3228 which is a C6HSA. Only online sellers in Canada want Cdn$12 - 16 each and 10 miles from me across the border they are US$2.99 but the border is still closed!

Now I have a number I'll try my local parts guys

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