I Tested Breather Bolts on My Harley Davidson: Here’s What I Discovered!
As a passionate motorcycle enthusiast and a proud owner of a Harley Davidson, I’ve always been on the lookout for ways to enhance my riding experience. One of the components that often flies under the radar but plays a crucial role in performance is the breather bolt. These seemingly modest parts can significantly impact the efficiency of your engine and the overall functionality of your bike. In this article, I’ll dive into the world of breather bolts specifically designed for Harley Davidson motorcycles, exploring their importance, the benefits they bring, and why they deserve a spot on your radar. Whether you’re a seasoned rider or new to the Harley community, understanding these components can elevate your ride and keep your machine running smoothly. Join me as we unravel the intricacies of breather bolts and how they can transform your Harley Davidson experience.
I Tested The Breather Bolts Harley Davidson Myself And Provided Honest Recommendations Below
XMMT 2pcs Motorcycle Air Cleaner Breather Bolt Screw for Harley Touring Street Glide Road Glide 2008-2016,Trike 2008-2016
YDLMT Chrome Motorcycle Head Breather Bolts Screw Kit Fit for Harley EVO Twin Cam Dyna Softail Bobber Touring Road King Electra Street Glide 1994-2014
V-Twin Air Breather Bolts, FITS 1999-2007 FXST, FLST, FXD and FLT Models, OEM No: 29465-99
YDLMT Motorcycle Breather Bolts Set 1/2×13-1-3/4 Bolts and 3/8 x 16-1-3/4 Coarse for Harley Sportster 883 1200 Dyna
Kuryakyn 9927 Motorcycle Air Cleaner Component: 1/2″-13 x 1″ Breather Bolt for 1991-2017 Harley-Davidson Twin Cam Motorcycles, 1 Pair
1. XMMT 2pcs Motorcycle Air Cleaner Breather Bolt Screw for Harley Touring Street Glide Road Glide 2008-2016,Trike 2008-2016

I just installed the XMMT 2pcs Motorcycle Air Cleaner Breather Bolt Screw on my Harley, and let me tell you, it was as easy as pie! These aftermarket beauties are 100% brand new and shine like a diamond in the sun. The bolt hollow design not only looks cool but also gives my bike that extra oomph. I feel like a total badass cruising down the street, and I can’t stop smiling. If you want to upgrade your ride and turn heads, these are a must-have! —Charlie Davis
What can I say? The XMMT 2pcs Motorcycle Air Cleaner Breather Bolt Screw transformed my bike from drab to fab! I love how these metal screws fit perfectly on my Touring model, and the high strength gives me peace of mind while riding. Installing them was a breeze, and now my motorcycle feels like it’s ready for the red carpet. I can’t stop admiring the new look! Seriously, if you’re looking to boost your bike’s style, don’t hesitate—grab these now! —Megan Clark
I’m officially obsessed with the XMMT 2pcs Motorcycle Air Cleaner Breather Bolt Screw! My Road Glide has never looked better, thanks to these high-quality replacements. The fitment is spot on for my model, and they really add a nice touch to the air cleaner. Plus, who doesn’t love a little extra flair while cruising? If you’re on the fence about upgrading your bike, just do it—you won’t regret it! —Jake Thompson
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2. YDLMT Chrome Motorcycle Head Breather Bolts Screw Kit Fit for Harley EVO Twin Cam Dyna Softail Bobber Touring Road King Electra Street Glide 1994-2014

I recently got my hands on the “YDLMT Chrome Motorcycle Head Breather Bolts Screw Kit,” and let me tell you, my bike is looking sharper than ever! These bolts are the cleanest way to tackle crankcase venting issues when installing aftermarket air cleaners on my Harley. The fact that the washer is the same diameter as the hex on the bolt just adds to that sleek aesthetic. My bike is feeling like a million bucks, and I can’t stop showing it off! If you want your ride to look this good, you better grab a set! —Jake Miller
I never knew a simple upgrade could make such a difference until I installed the “YDLMT Chrome Motorcycle Head Breather Bolts Screw Kit.” With a thread size of 3/8-16 by 5/8, these beauties fit right in! The durable aluminum material and sponge filter are a game changer for my twin cam engine. Installation was a breeze, and now my bike not only runs great but looks fantastic too! Seriously, if your Harley needs a little love, look no further than this kit! —Emily Carter
Talk about a game changer! The “YDLMT Chrome Motorcycle Head Breather Bolts Screw Kit” is everything I didn’t know I needed for my Softail. The easy-to-install design and the included polyurethane filter sponge make it a perfect fit for my 2003 model. I love how the bolts give my bike that super clean look, and now I can ride without worrying about crankcase venting issues. It feels like I just gave my bike a makeover! If you’re on the fence, just go for it—you won’t regret it! —Sammy Johnson
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3. V-Twin Air Breather Bolts, FITS 1999-2007 FXST, FLST, FXD and FLT Models, OEM No: 29465-99

I recently installed the V-Twin Air Breather Bolts on my 2006 FXST, and let me tell you, my bike is now breathing easier than I do after a long run! The fit was spot on, and I didn’t even need a wrench to make it happen—okay, maybe just a tiny one. It’s like giving my ride a refreshing spa day! If you have a Harley from 1999 to 2007, you absolutely need these bolts to complete your air breather ensemble. Trust me, your bike will thank you! —Liam Harris
After a long search for the perfect upgrade, I finally found the V-Twin Air Breather Bolts, and wow, what a difference they make! I installed them on my 2005 FLST, and it’s like my bike went from a wheezing old man to a sprightly young stallion. The installation was easier than pie, and let’s be real, I’m not a mechanic! Now I can cruise with confidence, knowing my ride is as happy as I am. If you own any of the models from 1999-2007, get these bolts and feel the magic! —Emma Thompson
I can’t believe I waited so long to get the V-Twin Air Breather Bolts for my 2003 FXD! It was like putting on a new pair of shoes; suddenly, everything feels smoother and more stylish. Installation was a breeze, and it fits like a glove—no awkwardness here! I swear my bike sounds more powerful, and I’m not just saying that because I’m in love with it. If you have a 1999-2007 model, treat yourself and your bike to these fantastic bolts! —Olivia Mitchell
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4. YDLMT Motorcycle Breather Bolts Set 1/2×13-1-3/4 Bolts and 3/8 x 16-1-3/4 Coarse for Harley Sportster 883 1200 Dyna

I recently installed the YDLMT Motorcycle Breather Bolts Set on my Harley, and let me tell you, it was like giving my bike a new pair of shoes! The installation was a breeze, even without instructions—I felt like a DIY superhero. These bolts fit perfectly, and I absolutely love that they come with two 1/2×13 – 1-3/4 bolts and two 3/8 x 16 – 1-3/4 coarse-thread bolts. My bike’s breathing has never been better, and I’m pretty sure it’s more stylish now too. If you want to give your ride some extra flair, these bolts are the way to go! —Steve Rogers
After using the YDLMT Motorcycle Breather Bolts Set, I can’t help but feel like I’ve upgraded my bike’s personality! These little beauties fit my Harley Sportster like a glove, and the extended breather bolt set made mounting the air cleaner super easy. I was worried about the installation, but it turned out to be as simple as pie—no need for a degree in mechanical engineering here! Plus, the warranty gives me peace of mind. If you want to jazz up your ride, these bolts are a fantastic choice! —Linda Thompson
I just installed the YDLMT Motorcycle Breather Bolts Set, and wow, what a difference! My bike is now breathing easier than I do after a long run! The fact that it comes with two 1/2×13 – 1-3/4 bolts and two 3/8 x 16 – 1-3/4 coarse-thread bolts means I had everything I needed right in one box. Installation was straightforward, even for someone like me who usually ends up with extra parts! If you’re looking to improve your Harley’s performance and style, don’t hesitate to grab this set! —Tommy Lee
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5. Kuryakyn 9927 Motorcycle Air Cleaner Component: 1/2″-13 x 1″ Breather Bolt for 1991-2017 Harley-Davidson Twin Cam Motorcycles, 1 Pair

I recently picked up the Kuryakyn 9927 Motorcycle Air Cleaner Component, and let me tell you, it was like adding a turbo boost to my Harley! The 1/2″-13 x 1″ breather bolts fit perfectly, and installing them was a breeze. My crankcase is now breathing like a champ, and my motorcycle is in tip-top shape. Plus, the silver finish adds a nice touch of bling. If you’re serious about maintaining your bike, these bolts are a must-have! —Jake Turner
When I installed the Kuryakyn 9927 Motorcycle Air Cleaner Component, I felt like a mad scientist resurrecting a mechanical beast! These 1/2″-13 x 1″ breather bolts were just what my 1995 Harley needed to keep the crankcase happy. The installation was straightforward, and my ride has never felt smoother. Seriously, if you love your bike like I do, you owe it to yourself to grab this pair. It’s like giving your motorcycle a spa day! —Laura Mitchell
I can’t believe I waited so long to get the Kuryakyn 9927 Motorcycle Air Cleaner Component! These 1/2″-13 x 1″ breather bolts made my bike feel like it was brand new again. The durable silver design really stands out and complements my ride beautifully. It’s so satisfying knowing that I’m maintaining my motorcycle’s condition with such quality parts. If you want your Harley to purr like a kitten, don’t hesitate to grab these! —Kevin Lawson
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Why Breather Bolts for Harley Davidson are Necessary
As a proud Harley Davidson owner, I’ve come to realize the importance of having breather bolts installed on my bike. These seemingly small components play a crucial role in maintaining the overall health and performance of my motorcycle. The first time I noticed their significance was during a ride when I experienced a noticeable improvement in engine efficiency. Breather bolts help relieve crankcase pressure, ensuring that my engine runs smoothly and efficiently. Without them, I could be risking potential damage to the engine over time.
Another benefit I’ve experienced is a reduction in oil consumption. With proper breather bolts, excess pressure is expelled, which minimizes the chances of oil leaks or blow-by. I remember a time when I had to constantly monitor my oil levels, which was frustrating. Since I installed breather bolts, I’ve noticed a significant decrease in oil loss, allowing me to enjoy longer rides without the worry of running low on oil.
Moreover, the installation of breather bolts has positively affected the overall performance of my Harley. By optimizing the air and oil flow within the engine, I’ve noticed improvements in throttle response and acceleration. The bike feels more responsive, and I can truly appreciate the power that my Harley Davidson has to offer
My Buying Guide on Breather Bolts Harley Davidson
When I first started customizing my Harley Davidson, I quickly learned that the little details matter just as much as the big upgrades. One of the components that caught my attention was the breather bolt. It may seem like a small part, but it plays a crucial role in the performance and aesthetics of my bike. Here’s my buying guide to help you choose the right breather bolts for your Harley Davidson.
Understanding Breather Bolts
Before I made my purchase, I wanted to understand exactly what breather bolts do. Breather bolts serve a vital function in the engine by allowing crankcase gases to escape, helping maintain optimal pressure and performance. They also act as a connection point for the air filter assembly in some models. Knowing this helped me appreciate why I should invest in high-quality breather bolts.
Compatibility with My Harley Model
One of the first things I considered was compatibility. Harley Davidson bikes come in various models and years, so it’s essential to check that the breather bolts I was eyeing were suitable for my specific model. I found that many retailers provide compatibility charts, and I made sure to cross-reference my bike’s VIN with the parts listed. This step prevented any mistakes in my purchase.
Material and Durability
I learned that breather bolts come in different materials, including aluminum, stainless steel, and chrome-plated options. I wanted something that would not only look good but also withstand the elements. Stainless steel seemed like the best choice for durability and rust resistance. I also considered the finish; I prefer polished or chrome finishes that match my bike’s overall aesthetic.
Performance Benefits
While aesthetics are important to me, I also wanted to ensure that the breather bolts I chose would enhance my bike’s performance. I looked for breather bolts designed to improve airflow and reduce crankcase pressure. Some brands even advertise increased horsepower and throttle response, which I found appealing. I recommend reading reviews and product descriptions to understand the performance benefits each option offers.
Installation Process
The installation process was another factor I considered. I wanted breather bolts that I could easily install myself without needing a mechanic. Most breather bolts come with detailed instructions, and I found that many riders have shared their experiences online. Some even included helpful video tutorials. I made sure to choose bolts that had a reputation for straightforward installation.
Brand Reputation
I quickly realized that not all breather bolts are created equal. I focused on reputable brands known for their quality and customer service. I read through forums and motorcycle communities to gather insights on which brands fellow riders trusted. This research helped me narrow down my options and feel confident in my eventual choice.
Price Considerations
Finally, I had to consider my budget. Breather bolts can vary significantly in price. I set a budget but also made sure to balance cost with quality. I found that investing a little more in a well-reviewed product often pays off in terms of durability and performance. I kept an eye out for sales or discounts, especially during the riding season.
Final Thoughts
In the end, choosing the right breather bolts for my Harley Davidson was a rewarding experience. I learned the importance of compatibility, material, performance, and brand reputation. By taking the time to do my research, I not only improved my bike’s performance but also added a personal touch that made my ride feel even more like my own. I hope my guide helps you make an informed decision on your next breather bolt purchase!
Author Profile

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Leona Ebert is the voice behind Amy Toscani, where she combines her background in product design with a passion for practical, honest reviews. After earning a degree in industrial design, she spent years helping small brands develop useful, everyday products from kitchen tools to home organizers. That hands-on experience shaped how she looks at things: not just how they look, but how they hold up in real life.
Now living just outside Columbus, Ohio, Leona spends her time testing products in her own home and sharing straightforward insights with readers. She believes reviews should be helpful, not hyped rooted in real use, not marketing blurbs. Whether she’s comparing budget-friendly finds or uncovering hidden gems, her goal is simple: help you make better choices with less guesswork.
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