Foam filters are fine if you oil them.
My motor bike runs a foam fillter which is oiled and it needs cleaning after every day riding if the conditions are dusty and its only a 450cc, so it would be sucking less air then your rrc. Which can be a pain in arse
Dad and I also run ramflow filters on our mini (twin 1.5" su's) and on the packet it says the filters must be oiled if using out side the metro area and or in dusty conditions.


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