air filter
Anyone that uses a K&N for anything more that dune riding or drag racing is craxy. Its a horrible choise for track conditions and mine want ever see one thats for sure! I used to clean dust from the carb boot of my yfz all the time when using a k&N. Im not sure about the stock filter mount system on my new r450 i would like some type of proflow kit with a metal flange to make sure it has a secure seal.