Why is that filter so tight!

[Lindsay S]

Here’s a question for you all and one that applies not only to our beloved motorcycles but to all engines employing a spin-on oil filter. Why, when they are screwed on with bare hands, does it take such tremendous force to remove them! I have just dropped the oil on my Flash after the engine’s first 500 miles and when I came to remove the Norton type filter, which was fitted just two and a half months ago, it took a lot of force with a chain wrench. Just glad I put it in a place where it was easily accessible!

[Triton Thrasher]

It goes on with oil on the rubber ring. The oil gets squeezed out.

[Lindsay S]

That makes sense but I was wondering if there was something special about that rubber, is it extra sticky?

[groily]

They all seem to be like that Lindsay. It's good they don't self-detach ever.
You can get at yours - but on my Notrun the PO put the filter right up behind the oil tank between frame and rear mudgard. Probably completely 'normal' on them, but very hard to undo sometimes. Hard enough to see even. Had to make a weapon to get the thing off first time I changed it. Probably buy a wrench with a pivot, but when you need one NOW  . . . Half inch bar and some bodgery, works pretty well.
Cars  . . . I've often pierced them right through with a long steel bar with a pointy end ground on and used that to get them started, if there's access. Can't do that on the Notrun though, no room and it'd bust the mounting I should think.

[Greybeard]

Cars  . . . I've often pierced them right through with a long steel bar with a pointy end ground on and used that to get them started

Didn't you want to say large screwdriver? 😜

[trevinoz]

This is what I use.

[BSA500]

I had to unplumb my oil filter and bracket. Then crush the oil filter in a vice and clout the bracket until it came undone

[muskrat]

G'day Lindsay.
"They all do that sir" even with the recommended fitting of 1/4 turn after the seal contacts.
There are many types of oil filter tool out there, I have most of them. I use the filters with the hex on top mostly but 9 times out of 10 it rounds off. I usually revert to the plier type to remove them.
Cheers