remove the front airbox section,the part held in by a rubber strap,unclip the brake vac hose from the housing to allow you to remove it.the air filter is in the next section to that,held in by 2 20 torque type screws,pop the screws out and pull in the upwards/outward motion,its a bit tricky to relocate the lower legs of the filter housing when refitting but dont force it or itl become a nitemare
r500c, January 2009