Contributed by Jarel Jensen

(Click on pictures to enlarge)

First remove the fuel tank to expose the airbox.  See the Tank Removal Guide if you don't know how to do this.

Remove the fuel tank mounting bracket by removing the two bolts with an allen wrench.

Remove the single screw holding the air filter box in place.

The air filter box consists of the filter housing, filter, lower snorkel half and upper snorkel half.  You can remove the snorkel from the filter housing by removing the two screws holding it in place.  You can remove the two snorkel halves from each other by removing the two screws at the end of the snorkel.

You can see the front part of the airbox stays in place, connected to the carbs.

Take out the new K&N filter, and oil it according to the directions included with the filter.  This will be with either liquid or spray K&N filter oil.  Let the oil soak in for 20 minutes.  There should be no white showing.  If there is, apply more oil to those spots.

The K&N filter will go in the air filter box in place of the stock filter.  You can then reassemble the box.

OPTIONAL:  Higher Airflow Applications

If you've installed a high-flow muffler and/or a jet kit, you may want to increase the airflow even more by modifying the snorkel housing.

Option 1: Leave the top half of the snorkel off.  This will give you the greatest increase in airflow to the new filter.  If you haven't upped the jet size significantly, this may be too much air and the bike will run too lean.  You'll know it because you'll have a bogging down sensation when you open the throttle at lower rpms. 

Option 2: Remove the white plastic foam filter cap in the end of the snorkel, leaving the end wide open.

Option 3: Drill to 1/2" holes in the top of the snorkel, directly above the air intake tubes in the lower snorkel.

(No picture because I chose option #2)

K&N provides a maintenance sticker to mark the airbox as containing a K&N lifetime filter.  This will let your dealer know not to mess with the air filter when you take your bike in for service.