How to change or replace an air filter on a Harley-Davidson Sportster motorcycle


A diy, step by step video demonstration on how to change or replace an air filter on a Harley-Davidson Forty-Eight Sportster motorcycle with K&N filter.

This procedure can also be used to change a stock Harley-Davidson air filter on other Harley-Davidson Sportster motorcycles.


This is a video sharing a replacement of a stock Harley-Davidson Sportster air filter with a K&N air filter.

I'm also going to be replacing the Harley Sportster 48 air filter cover with the iron air filter cover.

To replace the air filter I will be using a 3/16 hex wrench, a t27 Torx or star wrench, a flathead screwdriver, because I am replacing the stock air filter with a K&N air filter along with a torque wrench that you will see later in the video.

As you can see here I'm going to be using electric tools although only hand tools are needed for this.

The pleats on the stock Harley-Davidson are much more than the pleats on the K&N, which means that there is a greater surface area.

The other thing you'll notice is that the wire mesh is aboutthe same size.

Although the increased amount of pleats offers an increased amount of surface area, the less amount of pleats in the K&N along with the filter material do create a higher flow.

For those concerned about oil and the K&N air filters, it should be noted that Harley-Davidson Screamin' Eagle brand also offers K&N in their performance parts, as well as considering the two ports that recirculate the engine oil directly into the air filter regardless of its stock or if it's K&N.

Although the K&N air filter does provide a gasket, I did create an adhesive with gasket maker to hold the gasket in place.

Since I am using a power tool I will start each fastener by hand.

The torque specifications for the air filter cover are 36 to 60 inch pounds.

The air filter 40 to 60 inch pounds. I have set my torque wrench to 50 (inch pounds) for both.

Hey, Thank you very much for viewing this page. I had a great time making this video and I hope you take some time to watch it.

In this video:
K&N Air Filter: HD-1212

Hand Tools:

TEKTON Hex Key Wrench Set
TEKTON Star Key Wrench Set

Power Tools:
Milwaukee M18 ¼ in. Hex Impact Driver (tool only)

Kits (w/ Battery and charger):
Milwaukee M18 ¼ in. Hex Impact Driver Kit
Milwaukee M18 Hammer Drill/Impact Driver Kit

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This video is for demonstration and entertainment purposes only. All viewers must take responsibility for their own choices and actions. The creators of this video and anyone recorded in the video are not responsible and do not assume any responsibility for all purchases, damage, injury, death or dismemberment resulting from the performance of any operation in this video. Use the proper parts, specifications and safety procedures for your own application.

10/20/2018 | How to change or replace an air filter on a Harley-Davidson Sportster motorcycle