Do the air boxes on Puch Maxis actually filter out particles of any particular size or do they just maintain proper air flow (or both)?
the air box wont. but the filter inside does.
What's inside (my air box doesn't come apart, so the filter material isn't accessible) - steel wool, paper? I can see some sort of metal screen through the hole where the hose attaches, but nothing beyond that.
How long should the 'filter' last (mileage-wise, assuming normal use).
forever, its just a screen- it keeps the bugs out too.
that metal screen thing is your filter. they last forever. just wash it.
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