Not sure what size it is!! Either 35 or 40mm. Bought it on Ebay. It is made for Pocket bike applications. It has a rubber fitting on it so I was able to stretch it onto the carb. Search "Pocket Bike Parts" or "Air Filter" on Ebay.
I've been meaning to ask - the air filter - what size, part#, etc?
K&N Part#
I need one - with a K&N part# I can perhaps source equivalents as well.
Thanks!