Spark Plug Thread size on a 16 valve 750

[cloudbreakmd]

I thnk it's 14 mm but could somebody please confirm this? I am thinking about getting a Colortune.

[p_s]

You can look it up on ngk.com, but every Suzuki and Honda and Kaw motorcycle I've tinkered with has been 12 mm.

[cloudbreakmd]

I tried the NGK site but couldn't find the thread size.

[cloudbreakmd]

Figured it out... Look at the part number on spark plug. The first letter corresponds to the mm size.

Use the first letter of the product code to determine the adapter. Remember colortune comes with 14mm threads.
A - 18mm
B - 14mm
C - 10mm
D - 12mm
J - 12mm


Example: D8EA 1983-1980 SUZUKI GS750 750


12 mm plug size

[cloudbreakmd]

Additional reading for those interested.

http://www.ngksparkplugs.com/docs/tech/partnumberkey.pdf

[MakDad]

Bring this one up from the grave.......

Sorry to do it, but did ANYONE ever come up with the answer to the question: What is the thread size on the D8EA plugs? 12 x ???

[Steve]

Sorry to do it, but did ANYONE ever come up with the answer to the question: What is the thread size on the D8EA plugs? 12 x ???

Look up just two posts, to post #4, then ask the question again.

.

[MakDad]

nice

Look up just two posts, to post #4, then ask the question again.

.

Correct me if I'm wrong (new to this), but doesn't the THREAD SIZE have to contain the pitch size also. Maybe THAT's what I was hinting at....