so this may sound stupid...but when are you supposed to change out your air filter!? i bought my f4i with 7,000 on it...it now has 21,000 and haven't touched the filter at ALL.
took the tank off and such to have a look...that bitch looked like new still?
am i even supposed to change the filter out? looked good to me? i was going to buy a K&N or the pipercross from that group buy..but after looking at the filter..i dunno