Spark Plug metric size

[jbird7262]

OK, I think I saw mention to this before, I bought an Actron compression tester and it only goes to 14mm, I can get an adapter to step down the size, they have a 12mm and a 10mm. I'm thinking that the CB750 1975 is a 12mm, I can't find the size in my manuals, anyone have the correct size so I don't order wrong? Thanks JayD

 

[Travis]

Yes you're right. The '75 is 12mm. Bummer that the tester didn't come with the adapters.

 

[jbird7262]

Got it!! "Fleabay" $ 8 and some change, 12mm with a 14mm female end.