• Spark plug thread size?

Posted: **Fri Jan 14, 2011 4:30 pm**

had a quick search on the forum but couldn't find the thread size and pitch, could someone help me out, as i'll be buying a compression tester this weekend.

Karl :)

Posted: **Fri Jan 14, 2011 4:38 pm**

8mm but not sure about the thread, my comp tester came with adptors for all plugs and threads. Gunson i think the make is

Posted: **Fri Jan 14, 2011 4:45 pm**

are they not some crazy ass imperial size?

Posted: **Fri Jan 14, 2011 4:48 pm**

i believe some are this 1/8 NPT

npt stands for "national pipe thread"

i know the CBR125 uses this thread,

as does the caliper retaining pin on the VFR.

Posted: **Sat Jan 15, 2011 5:11 am**

if my kit doesn't come with the correct size adapter, i'll just knock one up from and old spark plug :)

Posted: **Mon Jan 17, 2011 12:21 pm**

Can anyone confirm the type of thread please :)

Posted: **Tue Jan 18, 2011 10:39 pm**

My GUESS would be M10 x 1.25 (fine), will take a look tonight if you want.

Posted: **Wed Jan 19, 2011 1:44 am**

Hi, i think there 8mm metric fine. Have you tried NGK website see if specs are on there?
Cheers
Ian

Posted: **Wed Jan 19, 2011 2:07 am**

Morespeedvicar wrote:i think there 8mm

D'oh!! Of course they are...

Posted: **Wed Jan 19, 2011 4:45 am**

Thanks for the help guys, one step closer to getting my compression gauge now :D
This will establish whether or not i'll rebuild the internals on my engine.

Spark plug thread size?

Spark plug thread size?

Re: Spark plug thread size?

Re: Spark plug thread size?

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Re: Spark plug thread size?