I just bought a 99 996 and it has a carbon fiber air box, I take off the tank today and low and behold there is no filter under the tank, I see the stacks sticking out with no filter, should I be concerned? I took the thing for a ride before I bought it so I am worried some junk got down in the stacks??? Why would there not be an air filter under the tank? Was the guy I bought it from trying to hide some thing or make it run better short term???? Sorry for all the questions this is my first Ducati.