On Fri, 17 Nov 2006 17:36:48 GMT, "Ralph Mowery"
wrote:


"mm" wrote in message
news
It seems to me that all the screws and bolts on my Japanese motorcycle
are metric, except the sparkplugs.

AFAICT, neither the threads nor the socket required for the sparkplugs
used in my Honda are metric. Is that so, and how did it happen?



I don't know about the newer cars, but about 20 years ago when I was going
to change the plugs in my first Datsun I stopped in the local Advance Or
Autozone store to get some plugs and a socket. I had a good collection of
American tools but nothing metric at the time. Told the guy in the store I
needed a socket for the plugs and thought it would be metric. He did not
know. We took some metric wrenches and matched them to the plug. They did
not fit,but when I put one inthe American wrenches, they did. Turned out I
had the plug socket for them all the time. Talked with a mechanic later
and he told me at that time all the plugs he changed were the American type.
I don't remember about the threads.

I think now I remember that even American plugs have metric threads,
like others have said. (It's just that HD didn't have 14mm nuts)

But we agree that they take English spark plug sockets, at least in
the US. Don't know about Japan.



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