Hey.
I'm currently getting a 72 Eldo back on the road and one thing that was kind of elusive was an air filter to fit the original airbox. I'm in Australia and getting this sort of stuff is a bit difficult. Yes - I could have just ditched the airbox and run pods but I was keen to keep a functioning airbox if possible.
Anyway, I have a friend who is a dirt bike nut and has a mountain of spares - I was thinking maybe a dirt bike foam filter might work.... so he found me a filter from him KTM stash...

This one fits Husky, KTM and Gas gas - but you could probably use other foam filters as most dirt bikes run a similar setup.

A couple of slits to let the cover plate stand-offs through

And it fits in there pretty well.


There's about 5-10mm to squash down once the cover plate is bolted back in.
Anyhow - thought I'd share as this might help someone else.