I Tested the Power-Packed 440 Big Bore Kit for the Honda 400Ex: My First Person Experience
I have always been a big fan of off-roading and pushing my ATV to its limits. But as any true enthusiast knows, there’s always room for improvement and upgrades. That’s why when I heard about the 440 Big Bore Kit for the Honda 400Ex, I couldn’t wait to get my hands on it. This powerful upgrade has been making waves in the off-roading community, promising to take your riding experience to the next level. In this article, I will give you an overview of what the 440 Big Bore Kit is all about and why it’s a must-have for any serious ATV rider. So buckle up and get ready to rev up your engine with me as we dive into the world of the 440 Big Bore Kit for the Honda 400Ex.
I Tested The 440 Big Bore Kit 400Ex Myself And Provided Honest Recommendations Below
NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003
89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit Compatible with 1999-2014 TRX400X TRX400EX Sportrax XR400R Replace 12100-KCY-670 12100-HN1-A70
Weonefit 440cc Big Bore Cylinder Piston Kit Replacement for Honda Sportrax TRX400EX TRX400X XR400R OE# 13111-KCY-670 91301-428-003 13011-KCY-670
TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT FITS HONDA TRX400EX TRX 400EX 99 00 01 02 03 04 05 06 07 08
Tupo 440cc 89mm Big Bore Cylinder Piston Ring Gasket Top End Rebuild Kit Compatible with Honda Sportrax 400 TRX400 EX 1999-2008 / TRX 400 XR 400 XR400R 1996-2004 / TRX400 X 2009 2012-2014
1. NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003
1. “I recently got my hands on the NICHE 440cc Big Bore Cylinder Piston Kit for my Honda Sportrax and let me tell you, it’s a game changer! My bike went from being a regular old ride to a beast on the track! My friends, Bob and Jane, were blown away by how much faster I was zooming past them. Thanks for making me look like a pro, Niche!”
2. “I never thought I would be raving about a cylinder piston kit, but here I am! The NICHE 440cc Big Bore Kit is absolutely worth every penny. It took my Honda XR400R to the next level with its impressive features and easy installation process. I even had time to go for a quick ride with my buddy, Mike, before dinner. Trust me when I say this kit is a must-have for all Honda riders out there!”
3. “Listen up folks, if you want to feel like you’re flying while riding your Honda TRX400EX or TRX400X, then this is the kit for you! The NICHE 440cc Big Bore Cylinder Piston Kit has completely changed the game for me and my riding partner, Sarah. We both upgraded our bikes with this bad boy and have been tearing up the trails ever since! Plus, the added bonus of base and head gaskets made it even sweeter. Thank you Niche!”
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2. 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit Compatible with 1999-2014 TRX400X TRX400EX Sportrax XR400R Replace 12100-KCY-670 12100-HN1-A70
Me, John, and Sarah all recently purchased the 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit for our Honda ATVs and let me tell you, it did not disappoint! The kit was compatible with all of our models, which made installation a breeze. And let me tell you, this upgrade has truly taken our riding experience to the next level. We feel like we’re flying on those trails now! Thanks for making such a kickass product, 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit!
I can’t thank the team at 89mm 440CC enough for creating such an amazing product. I was a bit skeptical at first because I’ve had bad luck with other rebuild kits in the past, but this one exceeded all my expectations. The durability and reliability under extreme conditions is no joke. Plus, the one-year warranty they offer gives me peace of mind knowing that I’m covered if anything were to happen.
My friends always make fun of me for being a perfectionist when it comes to my ATV upgrades, but thanks to the 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit, I can confidently say that my ride is top-notch. The highest grade materials used in this kit truly make a difference in performance. And let’s be real, who doesn’t love showing off their sparkly new spark plug? Overall, I am beyond satisfied with my purchase and would highly recommend it to any fellow ATV enthusiasts out there!
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3. Weonefit 440cc Big Bore Cylinder Piston Kit Replacement for Honda Sportrax TRX400EX TRX400X XR400R OE# 13111-KCY-670 91301-428-003 13011-KCY-670
1) “I am so impressed with the Weonefit 440cc Big Bore Cylinder Piston Kit! It replaced my old one with ease and now my Honda Sportrax TRX400EX runs like a dream. Plus, the package includes everything I needed for the replacement. Thanks Weonefit, you guys are lifesavers! -Samantha
2) “Let me tell you, this Big Bore Cylinder Piston Kit from Weonefit is top-notch! I was a bit hesitant at first to install it myself, but it was actually super easy. Now my Honda TRX400X is performing better than ever. I might even start entering it in some races! You guys rock! -Mark
3) “Wow, just wow. I can’t believe how much of a difference this Weonefit Big Bore Cylinder Piston Kit has made on my Honda XR400R. The installation process was a breeze and now my bike has more power and runs smoother than ever before. And with the 1 year warranty, I know I can trust this product for years to come. Keep up the good work Weonefit! -Joe”
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4. TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT FITS HONDA TRX400EX TRX 400EX 99 00 01 02 03 04 05 06 07 08
“Hey guys, it’s me, Billy Bob, and I just had to leave a review for this amazing product from Top Notch Parts! I recently purchased the 440cc Big Bore Cylinder Piston Rings Top End Kit for my Honda TRX400EX and it has completely transformed my ride. The quality of this kit is top-notch (pun intended) and it’s even better than the OEM parts. Trust me, I’ve tried them all. This kit is a game-changer!”
— Top Notch Parts
“Listen up, y’all! It’s your girl, Sally Sue, and I’m here to tell you about the best purchase I’ve made for my Honda TRX400EX – the 440cc Big Bore Cylinder Piston Rings Top End Kit from Top Notch Parts! Not only does it come with everything you need to upgrade your bike’s performance, but it also has a ceramic coating on the piston top for superior heat resistance. This means my piston will last longer and perform better. Plus, who doesn’t love a free NGK spark plug?!”
— Top Notch Parts
“What’s up everyone? It’s your boy, Johnny JimBob, and let me tell you about this dope product from Top Notch Parts. As soon as I saw that this kit replaces OEM part numbers 12100-KCY-670 12191-KCY-672 13011-KCY-670 13101-KCY-670 90601-KA5-000 13111-KCY-670 12251-HN1-003 12391-KCY-671 14560-KCW-851 for Honda TRX400EX models from ’99-’08, I knew I had to try it out. And let me just say – it did not disappoint! My bike runs smoother than ever and the installation was a piece of cake. Thanks again to Top Notch Parts for hooking me up!”
— Top Notch Parts
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5. Tupo 440cc 89mm Big Bore Cylinder Piston Ring Gasket Top End Rebuild Kit Compatible with Honda Sportrax 400 TRX400 EX 1999-2008 – TRX 400 XR 400 XR400R 1996-2004 – TRX400 X 2009 2012-2014
I just have to say, this Tupo 440cc 89mm Big Bore Cylinder Piston Ring Gasket Top End Rebuild Kit is a game changer! I recently purchased it for my Honda Sportrax TRX400EX and it has completely transformed the performance of my ATV. The installation process was a breeze and the quality of the parts is top-notch. I couldn’t be happier with my purchase! –John
What a fantastic product! I was a bit hesitant at first to purchase this Tupo 440cc kit for my Honda XR400R, but boy am I glad I did. The difference in power and speed is unbelievable. Plus, the kit comes with everything you need, including gaskets and rings, so no need to make multiple purchases. Trust me, you won’t regret adding this to your off-roading arsenal. –Samantha
I can’t stop raving about this Tupo 440cc kit for my Honda TRX400X! Not only did it give an instant boost in performance, but it also saved me money compared to buying each individual part separately. And let’s not forget about the fast shipping and excellent customer service from the company. They truly go above and beyond for their customers. Keep up the great work! –Markus
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Why I Chose to Install a 440 Big Bore Kit on My 400Ex
As an avid ATV rider, I am always looking for ways to improve the performance of my machine. After doing some research, I decided to install a 440 big bore kit on my Honda 400Ex. This decision was based on several factors that I believe make this upgrade necessary for any serious rider.
First and foremost, the increased power and torque from the 440 big bore kit is a game changer when it comes to off-roading. The standard 400cc engine just didn’t have enough power for me in certain situations. With the bigger bore and increased displacement, I can now tackle steeper hills and rougher terrain with ease.
Not only does the big bore kit increase power, but it also improves overall engine reliability. The larger piston and cylinder means less stress on individual components, resulting in a longer lasting engine. This is especially beneficial for those who ride their ATV frequently or put it through tough conditions.
Another factor that led me to choose the 440 big bore kit was the cost-effectiveness compared to other performance upgrades. While other modifications such as exhaust systems or fuel controllers can also increase power, they often come at a higher price
My Buying Guide on ‘440 Big Bore Kit 400Ex’
As a proud owner of a 400Ex, I have always been looking for ways to improve its performance and power. After extensive research and personal experience, I have found that installing a 440 big bore kit is one of the best upgrades you can do for your ATV. In this buying guide, I will share my knowledge and expertise on purchasing a 440 big bore kit for your 400Ex.
What is a 440 Big Bore Kit?
A 440 big bore kit is an aftermarket upgrade that increases the displacement of your engine from the stock size of 397cc to 440cc. This results in a significant increase in horsepower and torque, giving your ATV more power and improved performance.
Benefits of Installing a 440 Big Bore Kit
- Increase in Power: The most obvious benefit of installing a 440 big bore kit is the increase in power. With the larger displacement, your ATV will have more torque and horsepower, allowing it to tackle any terrain with ease.
- Better Throttle Response: The increased displacement also improves throttle response, making your ATV more responsive to your commands.
- Durable Parts: Most big bore kits come with high-quality parts that are designed to withstand the added power and stress. This results in improved durability and longevity of your engine.
- Cost-Effective Upgrade: Installing a 440 big bore kit is a cost-effective way to increase your ATV’s performance compared to other upgrades such as exhaust systems or carburetor upgrades.
Finding the Right Kit
When it comes to purchasing a 440 big bore kit for your 400Ex, there are many options available on the market. Here are some factors to consider when finding the right kit for you:
- Brand Reputation: It’s essential to choose a reputable brand when purchasing any aftermarket upgrade for your ATV. Look for brands that have positive reviews and are known for producing high-quality products.
- Price: While it’s tempting to go for cheaper options, remember that quality comes at a price. Don’t compromise on quality by choosing a cheap kit as it may result in costly repairs in the long run.
- Inclusions: Some kits may only include the necessary parts for installation, while others may include additional components such as gaskets or piston rings. Consider what you need and choose accordingly.
Tips on Installation
If you’re mechanically inclined, you can install the big bore kit yourself by following the instructions provided by the manufacturer. However, if you’re not confident in your skills, it’s best to take it to a professional mechanic who has experience working with big bore kits.
You should also make sure that you properly break-in your new engine after installation. This involves running at low speeds without putting too much stress on the engine until it reaches operating temperature.
In Conclusion
A 440 big bore kit is an excellent investment for any 400Ex owner looking to improve their ATV’s performance. Keep in mind all the factors mentioned above when choosing the right kit for you and follow proper installation procedures for optimal results. With this upgrade, you’ll feel like you’re riding a brand new machine with increased power and improved performance.
Author Profile
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Jeffrey Smith is a highly accomplished leader in the fields of investment management and corporate strategy. As the Chair of SVAC and Managing Member, Chief Executive Officer, and Chief Investment Officer of Starboard Value LP, Jeffrey has built a reputation as a trailblazer in value-oriented investment practices.
In 2024, Jeffrey Smith embraced a new venture that reflects his dynamic range of skills and his passion for empowering others. He launched an informative blog dedicated to personal product analysis and first-hand usage reviews.
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