I have a 1995 CBR 600F3, the foam inside the filter assembly has disintegrated and is coming out. There is not replacement for this part being made anymore, nor can I find it online (17250-MAL-600). Does anyone know if I can simply crack this thing open and put dense foam in there? Any other suggestions?

https://www.partzilla.com/product/ho...38e491371a9f57

 

No reason why not. I'd do it.

 

you could open it for sure and just take the foam out - it's just a baffle.

Or maybe this Nighthawk one would fit in the same space?

https://www.partzilla.com/catalog/ho...wk/air-cleaner

 

or this one from a whole range of 90's-2000's - you would need to blank off the port in your airbox as this one simply free vents.

https://www.partzilla.com/catalog/ho...-a/air-cleaner

 

I think better to put something like this in it. Easy enough to close with hot melt glue.