Oil filler cap size

[spicy]

Sort of a weird question and Google gives me absolutely nothing as a result.

What size in mm is our oil cap size?

I ordered a 34mm size that was supposed to be for Honda's and it didn't fit. It was too big of a threading.

Sizing they listed was 3.4cm/1.33 inches.

Any answers or ideas? Or anyone purchased an aftermarket cap that says a size on it?

 

[webby]

should be 33mm x 2.8mm thread pitch from what I found online -
http://store.skunk2.com/accessories/billet-oil-caps/billet-oil-cap-749.html

users have purchased caps used for the 8th gen si, and that one above works for the 8th gen

 

[spicy]

Thanks webby!