I often get old cars and bikes that have a very dirty air filter, damaged ones or the vehicle does not have the air filter at all. If I know that I can still make money on the vehicle, I will surely get a proper air filter for it but if I’m just going to play with it maybe I will just use a leg stocking for the air filter (I’m a “cheap” guy remember…)
I also have tried using sport filter foams, ventilation filters, air conditioning filters, mesh screens, but leg stocking is my favorite because they are the cheapest and they work! There is really nothing much to say about how to make them, just look at the photos and you’ll know how to make your own “sexy” air filter. Just remember to keep it thin or air passage will be affected. I use about two layers and thats it. Replace or clean it always especially if you use your bike on dusty off road areas.
Here is a picture of a leg stocking used as an air filter for my KDX200. I don’t have the bike with me anymore but it was a fun bike and I never had problems with my homemade air filter. I did lots of repairs on my KDX like new fork oil seals, new rear suspension oil seal, carburetor overhaul, engine tuning, iridium spark plug, suspension linkage repairs, new competition tires, new competition tubes, new rims, new handle bar, new steering head bearings, and lots more but I just couldn’t afford a proper air filter… hahaha!
Source: Repair Guides
