Are you tired of that ugly old stock air cleaner on your bike but not sure where to start on replacing it? Don’t worry, we got you covered with this short and easy step by step walk through. First thing you need to do is grab yourself one of our Lowbrow Customs Louvered Air Cleaners, a Gasbox Carb Support bracket for CV carbs, and a set of Lowbrow Customs breather bolts. Also available for S&S carburetors. Once it arrives, crack open an adult beverage and get ready to tackle this job in about 30 mins or less. Soon you will be back up and running, showing off not only your sweet mechanic skills but a great new look for that CV carbureted motor of yours.
Tools Needed For The Job
Lets Get Started
Step 1: Loosen and remove the two screws that are holding the air cleaner cover on using a #3 Phillips screw driver. Pull off he cover after the two screws have been removed. Then remove the air filter element exposing the backing plate.
Step 2: Loosen stock breather bolts using a 5/16” Allen socket. Then loosen the three screws holding the backing plate with a 5/32” Allen socket. These will not come out of the backing plate, Harley-Davidson designed them to stay with the backing plate. Remove both stock breather bolts and the backing plate.
*Note* - Since CV carbs are spigot mounted they will need to have a support bracket or there is a possibility of it becoming disconnected from the manifold.
Step 3: Install Gasbox Carb support bracket for CV carbs using Lowbrow Customs breather bolts. You will use a 1/4” allen socket to install the breather bolts into the heads. We recommend a drop of red Loctite. Aligning the holes on the support bracket to the carburetor will determine the correct orientation of the bracket. Do not full tighten down the breather bolts just yet, allow some wiggle room for the carb support bracket to be attached to the carburetor.
Step 4: Separate the Lowbrow Customs Louvered air cleaner from it’s backing plate by removing the long screw using a #3 Phillips screw driver.
Step 5: With supplied gasket, peel off the white backing exposing the sticky side and apply to the Gasbox Carb Support Bracket by aligning the holes. Press firmly down to secure.
Step 6: Align the Lowbrow Customs Louvered air cleaner backing plate to the holes on the carb support bracket. Using a T-handle 1/8” allen, attach the backing plate to the carb support bracket using the three supplied screws. We strongly suggest using a dab of blue Loctite on each screw. The upper hole to the left of the carb is a vent and should not have a screw installed. (see photo above)
Step 7: After double checking that the three backing plate screws are securely tightened to the support bracket, tighten down the breather bolts securely.
Step 8: Lowbrow Customs breather bolts come with mesh filter screens and snap rings to retain the mesh screen. First you must determine the large mesh side from the fine mesh side. Insert the large mesh side into the breather bolts exposing the fine mesh out towards you. Using snap ring pliers insert both snap rings into the breather bolts and push forward till they click into the grooves locking the mesh in place.
Step 9: With the air filter element inside the air filter cover align the center screw to the center hole of the backing plate and securely tighten.
Whoa, that’s all there is to it, you’re done! Now you can fire that bad boy up and go for a ride.
*Note* You may need to re-jet your carburetor accordingly when switching to a high flow air filter system. If installing on an EFI model you will need to tune accordingly accordingly when switching to a high flow air filter system.
Still in need of some more help? Check out the video below.