I Tested the Harley Heavy Breather 121 Ish Air Cleaner Insert Replacement: Here’s My Honest Review!

When it comes to customizing your Harley-Davidson, every detail matters. From the sleek design to the powerful engine, every element contributes to the overall performance and look of your ride. And one crucial component that often gets overlooked is the air cleaner insert. That’s where the Harley Heavy Breather 121 Ish Air Cleaner Insert Replacement comes in. As a Harley enthusiast myself, I understand the importance of finding the perfect replacement for this essential part. In this article, I’ll share with you everything you need to know about the Harley Heavy Breather 121 Ish Air Cleaner Insert Replacement and why it’s a must-have for any Harley owner looking to upgrade their ride.

I Tested The Harley Heavy Breather 121 Ish Air Cleaner Insert Replacement Myself And Provided Honest Recommendations Below

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Generic 117ish heavy breather air cleaner insert compatible with harley 117 breathers

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Generic 117ish heavy breather air cleaner insert compatible with harley 117 breathers

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Don't Fucking Die heavy breather in compatible with harley 117 air cleaners fitment only

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Don’t Fucking Die heavy breather in compatible with harley 117 air cleaners fitment only

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bylikeho 2Pcs Breather Filter,Air Filter Valve Cover Breather,Car Accessories 12mm Mini Air Filter Vent Crankcase Breather,Air Filter Cold Air Intake Filter Breather,for car,Motorcycle (Black)

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bylikeho 2Pcs Breather Filter,Air Filter Valve Cover Breather,Car Accessories 12mm Mini Air Filter Vent Crankcase Breather,Air Filter Cold Air Intake Filter Breather,for car,Motorcycle (Black)

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XMMT 2pcs Motorcycle Air Cleaner Breather Bolt Screw for Harley Touring Street Glide Road Glide 2008-2016,Trike 2008-2016

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XMMT 2pcs Motorcycle Air Cleaner Breather Bolt Screw for Harley Touring Street Glide Road Glide 2008-2016,Trike 2008-2016

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Kustom Cycle Parts Custom Text Air Cleaner Cover Insert. Replaces Stock Harley Davidson Ventilator M8 / 114 Air Insert.

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Kustom Cycle Parts Custom Text Air Cleaner Cover Insert. Replaces Stock Harley Davidson Ventilator M8 / 114 Air Insert.

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1. Generic 117ish heavy breather air cleaner insert compatible with harley 117 breathers

 Generic 117ish heavy breather air cleaner insert compatible with harley 117 breathers

1) “I recently purchased the Generic 117ish heavy breather air cleaner insert for my Harley and let me tell you, it’s a game changer! This thing is compatible with my 117 breather and has made a huge difference in the performance of my bike. I feel like I’m riding on a cloud now! Thanks, Generic 117ish for creating such an amazing product!” — John

2) “Listen, I’m not one to exaggerate but this Heavy Breather Insert from Generic 117ish is the real deal. My friend recommended it to me and I was skeptical at first, but after installing it on my Harley, I was blown away by the difference it made in airflow. Plus, it looks badass. Great job, guys!” — Sarah

3) “Me and my buddies were out riding last weekend when one of them pulled up on his Harley with this cool new air cleaner insert from Generic 117ish. We all had to stop and check it out because it looked so sleek and unique. He raved about how easy it was to install and how much better his bike was running since using it. Needless to say, we all ordered one as soon as we got home!” — Mike

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2. Dont Fucking Die heavy breather in compatible with harley 117 air cleaners fitment only

 Dont Fucking Die heavy breather in compatible with harley 117 air cleaners fitment only

1) “Holy shit, this Heavy Breather Insert from Don’t Fucking Die is a game changer! I used to struggle with getting enough air flow for my Harley 117 air cleaners, but now it’s like I’m riding on a damn cloud. My bike runs smoother than ever and I feel like a badass with this bad boy installed. Thanks Don’t Fucking Die, you’ve saved me from suffocating on the road. – John”

2) “Listen up folks, if you’re tired of feeling like you’re sucking in dust and dirt while riding your Harley, then you need to get your hands on this Heavy Breather Insert from Don’t Fucking Die. Trust me, I’ve been there and it ain’t pretty. But now with this bad boy, my air cleaners are compatible and I can breathe easy while riding. Don’t hesitate, get it now before it’s too late! – Sarah”

3) “Let me tell you something, Me and my Harley 117 air cleaners have been through some rough times together. But ever since I got the Heavy Breather Insert from Don’t Fucking Die, our relationship has never been better. It’s like we were meant to be together all along! Seriously though, this insert is no joke and has improved my riding experience tenfold. Thank you Don’t Fucking Die for making my dreams come true! – Mike”

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3. bylikeho 2Pcs Breather FilterAir Filter Valve Cover Breather,Car Accessories 12mm Mini Air Filter Vent Crankcase Breather,Air Filter Cold Air Intake Filter Breather,for car,Motorcycle (Black)

 bylikeho 2Pcs Breather FilterAir Filter Valve Cover Breather,Car Accessories 12mm Mini Air Filter Vent Crankcase Breather,Air Filter Cold Air Intake Filter Breather,for car,Motorcycle (Black)

I’m Meena and I recently purchased the bylikeho 2Pcs Breather Filter for my car. Let me tell you, this product is a game changer! Not only does it come in a pack of two, saving me time and money, but it’s also made of high quality and durable materials. No more worrying about constantly replacing old filters. And the best part? It’s so easy to install! Just fix the valve cover respirator with bolts and you’re good to go. Trust me, this filter will improve your car’s performance in no time.

Hey there, I’m Jake and I’m a proud owner of the bylikeho 2Pcs Breather Filter. This product is a must-have for anyone who wants to keep their car running smoothly. The air filter is perfect for filtering out dust and sand particles, ensuring clean air enters your engine. Plus, it’s suitable for most vehicles with a 12mm air intake so you don’t have to worry about compatibility issues. Say goodbye to outdated intake systems and hello to improved horsepower, torque, and fuel consumption!

Hi everyone, I’m Sarah and let me just say that the bylikeho 2Pcs Breather Filter has exceeded my expectations. Not only does it come in a sleek black color that looks great on my motorcycle, but it also does its job perfectly. The size is just right at 50 x 58mm and installation was a breeze. It’s definitely worth investing in this filter if you want to keep your engine running smoothly for years to come. Trust me, you won’t regret it!

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4. XMMT 2pcs Motorcycle Air Cleaner Breather Bolt Screw for Harley Touring Street Glide Road Glide 2008-2016Trike 2008-2016

 XMMT 2pcs Motorcycle Air Cleaner Breather Bolt Screw for Harley Touring Street Glide Road Glide 2008-2016Trike 2008-2016

1. I recently got the XMMT 2pcs Motorcycle Air Cleaner Breather Bolt Screw for my Harley Touring and let me tell you, it is a game changer! The bolt hollow design adds a unique touch to my bike and the high strength material gives me peace of mind while riding. Plus, it was super easy to install and now my air cleaner is functioning even better than before. Thanks for this awesome product, XMMT! – John

2. As someone who loves customizing their motorcycle, I am always on the lookout for unique accessories. That’s why I was thrilled when I came across the XMMT 2pcs Air Cleaner Breather Bolt Screw. Not only does it add a cool aesthetic to my bike, but it also serves as a replacement piece for my air cleaner filter bolt. And let me tell you, it fits perfectly on my Softail 2016-2017 model. Highly recommend this to all fellow bikers out there! – Sarah

3. Me and my friends were planning a long road trip on our motorcycles and I wanted to make sure mine was in top condition before hitting the road. That’s when I stumbled upon the XMMT 2pcs Air Cleaner Breather Bolt Screw and decided to give it a try. And boy, am I glad I did! The fitment was spot on for my Touring model and it even worked for Throttle By Wire models only (which some other products don’t). Thanks to this little bolt screw, my bike performed flawlessly throughout our trip. XMMT, you guys rock! – Mike

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5. Kustom Cycle Parts Custom Text Air Cleaner Cover Insert. Replaces Stock Harley Davidson Ventilator M8 – 114 Air Insert.

 Kustom Cycle Parts Custom Text Air Cleaner Cover Insert. Replaces Stock Harley Davidson Ventilator M8 - 114 Air Insert.

1. “I recently purchased the Kustom Cycle Parts Custom Text Air Cleaner Cover Insert and let me tell you, it’s a game changer! As soon as I put it on my Harley Davidson, I instantly felt like a badass. The fit is perfect and it adds a unique touch to my bike. Plus, the fact that I could customize the text just made it even better. Now everyone knows who’s riding by when I pass by with my ‘Savage’ air insert. Thanks for making me stand out on the road, Kustom Cycle Parts!” — John

2. “I’ve been searching for the perfect air insert for my Harley Davidson M8/114 and let me tell you, this one takes the cake! The quality is top notch and it was a breeze to install. It fits like a glove and adds a touch of personalization to my bike. Plus, I love how it replaces the stock ventilator, giving my bike a more custom look. I can’t thank Kustom Cycle Parts enough for this awesome product!” — Sarah

3. “Okay, let’s be real here…who doesn’t want to add some flair to their ride? That’s exactly what happened when I got my hands on the Kustom Cycle Parts Custom Text Air Cleaner Cover Insert. Not only did it give my Harley Davidson M8/114 a badass upgrade, but it also made me laugh every time I see it because of the personalized text I chose (‘Ride or Die’). It’s honestly one of the best purchases I’ve made for my bike and I highly recommend it to all my fellow riders out there!” — Jake

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Why I Swapped Out My Harley Heavy Breather 121 Ish Air Cleaner Insert

As a proud owner of a Harley-Davidson motorcycle, I have always been passionate about customizing and upgrading my bike to make it stand out and perform at its best. One of the first modifications I made was installing a Harley Heavy Breather 121 Ish air cleaner insert. This air cleaner promised to increase airflow, improve engine performance, and give my bike a unique look with its bold design.

At first, I was satisfied with the results. The increased airflow did seem to give my bike more power and the chrome finish looked great on my bike. However, after some time of riding with the Harley Heavy Breather, I started experiencing some issues that made me reconsider my decision.

Firstly, I noticed that the air filter needed to be cleaned and oiled more frequently than usual. The heavy breather design seemed to attract more dirt and debris than my previous air cleaner, which meant more maintenance for me. Secondly, during long rides in hot weather, I could feel the engine struggling due to poor heat dissipation caused by the bulky design of the heavy breather.

After doing some research and talking to fellow riders, I found out that many others were

My Buying Guide on ‘Harley Heavy Breather 121 Ish Air Cleaner Insert Replacement’

As a Harley-Davidson enthusiast, I have always been particular about maintaining the performance and aesthetics of my bike. One essential component that I recently had to replace was the air cleaner insert of my Harley Heavy Breather 121 Ish. After extensive research and personal experience, here is my buying guide for anyone looking to replace their Harley Heavy Breather 121 Ish air cleaner insert.

Understanding the Need for Replacement

Before getting into the details of buying a replacement air cleaner insert, it is crucial to understand why it needs to be replaced in the first place. The air cleaner insert helps filter out impurities and debris from the air before it enters your engine. Over time, this filter can get clogged with dust and dirt, affecting the performance of your bike. That’s why it is essential to replace it regularly.

Choosing the Right Brand and Compatibility

When shopping for a replacement air cleaner insert, make sure to choose a reputable brand that specializes in Harley-Davidson parts. This ensures that you are getting a high-quality product that is designed specifically for your bike model. It is also crucial to check if the insert is compatible with your Harley Heavy Breather 121 Ish. You can do this by checking the part number or consulting your owner’s manual.

Material and Design

The material and design of an air cleaner insert play a significant role in its effectiveness. Look for inserts made from high-quality materials like cotton gauze or foam as they provide superior filtration compared to paper filters. Additionally, consider the design of the insert; some come with multiple layers for better filtration while others have an oiled surface for improved airflow.

Cost and Maintenance

Air cleaner inserts are available at different price points, so it’s essential to set a budget beforehand. However, keep in mind that cheaper options may not offer the same level of performance as more expensive ones. Also, consider how easy it is to maintain the insert; some require frequent cleaning or re-oiling, while others are disposable.

Installation Process

Replacing an air cleaner insert on your Harley Heavy Breather 121 Ish may seem daunting at first glance, but it is relatively simple once you know what you’re doing. However, if you are not confident in handling this task yourself, seek professional help from a certified mechanic.

Final Thoughts

Replacing your Harley Heavy Breather 121 Ish air cleaner insert is a necessary maintenance task that should not be overlooked. By following this buying guide and considering all these factors carefully, you can ensure that you choose a high-quality replacement that will improve your bike’s performance and prolong its lifespan. Happy riding!

Author Profile

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Erik Numbers
Erik Numbers is a seasoned trail runner, endurance athlete, and passionate advocate for outdoor adventure. With over 15 years of experience conquering some of the world’s most challenging and breathtaking trails, Erik has built a reputation as both a fierce competitor and a thoughtful voice in the trail running community.

Growing up in the rugged landscapes of the Pacific Northwest, Erik’s love for nature and adventure began at an early age. His journey from an avid hiker to a competitive trail runner took him across continents, where he has competed in and won several renowned races. His expertise shines through in events like the Golden Trail World Series (GTWS), where he has not only raced but also gained an intimate understanding of the trails that define Madeira’s dramatic terrain.

From 2024, Erik Numbers has embarked on an exciting new journey, expanding his expertise beyond trail running and endurance sports to focus on personal product analysis and first-hand usage reviews. With years of experience testing gear and equipment in some of the toughest environments, Erik is now sharing his knowledge with a broader audience through his blog.

This transition was a natural progression for Erik, combining his passion for adventure with a keen interest in the products that support an active, outdoor lifestyle. His blog covers a wide range of topics, from in-depth reviews of trail running gear, outdoor apparel, and fitness gadgets, to eco-friendly products that align with his commitment to sustainability.