Love the Polini space filter without the cover!
It is the only foam filter that works good with a dellorto or mikuni carburetor (any carb really) with the exception of a K&N type mesh filter! why people use double wall uni filters and other junk foam and other totally ridiculous and or restrictive filters I will never understand! It’s k&n, large mesh or Polini space filter or none,
I’ve used more open red foam filter material in the space filter also and gained 1 jet size too,
The Polini space filter will not get saturated with gas, water or anything condensation as well as ice, snow rain for any length of time,
I’ve just rode recently with a friend of mine who had a tomos with the double foam uni filter and the moisture on it froze @30 degrees when sun set on a mid 40s degree day after we were parked for a few hrs,
It was like him running with his choke on so we had to yank the filter and then he ran lean and stalled a few times, first time he locked so he probably soft seized, what a joke!
Just seeing that filter means I know you know what you’re doing :)