Here is my setup:http://www.performancemachine.net/project_raptor_350_01.html
There is a mount with UNI filter on E-Bay for $70 that is a pretty decent buy. K&N filters are more work in my opinion. More expensive as well because you have to use their cleaner and oil. K&N filters are around $45-$50. UNI filters are around $25. UNI filters can be cleaned with soapy water and the Yamaha filter oil is reasonable and a bottle goes a long way. By the way K&N filters aren't paper. They are a cotton mesh. No matter what filter you use, an Outer Wears cover is a good idea as well.