I have recently bought a k and n oil filter, but seems smaller then the k and n I already have. Just found out its from a new age, so my question is, are they the same? As I know when bought other makes they seem to be different sizes.

Just don't want to take it off and it's wrong.

 

you should be ok mate as i have noticed myself different brands of oil filters seem to be slightly different in size as long as the thread is the same and it seals i cant see an issue.

 

It will be fine

 

Cheers chaps

 

Used the small K&N filter on my RB for the last 3 oil changes & can't fault them!