Often overlooked for some reason, replacing the fuel filter is inexpensive and easy to do. (NAPA Fuel Filter 3032)

Prior to changing the fuel filter it's a good idea to either run your tank fairly low (like until the idiot light comes on) or siphon most of the gas out of it.

The first step is to remove the gas cap. Once opened, you'll see four small flush mounted Phillips screws around the perimeter that attach it to the tank. If they haven't been removed in a while then there can be corrosion in the threads. If you're not careful then you can strip the heads of these screws and cause yourself an unnecessary headache. The first thing to do is use a tack or other pointed instrument to clean out any dirt that's collected in the heads of the screws. Then, using a good Phillips screwdriver with an appropriately sized tip, apply downward pressure while turning to break the screw free and remove it.

(Photo borrowed from http://www.k100-forum.com/)

Once the gas cap is removed, you'll see the fuel filter in the left rear corner of the tank.  After you loosen the front hose clamp, there's enough slack on the other hose to the fuel filter to remove it from the tank and replace it outside of the tank. Note the direction of the arrow on the fuel filter (or IN/OUT markings on it) and install the new filter so that gas is flowing towards the short hose.

If you blow into the inlet of the old fuel filter and sense any resistance then you'll be glad that you replaced it.

When putting the gas cap back on, do not use he-man torque on its mounting screws, just get them nice and snug.

Then go for a ride.

© 2013 Drake Smith - Please do not use or reproduce this elsewhere.  Feel free to link to it though.