I Tested the Power-Packed 400Ex 440 Big Bore Kit: A Must-Try Upgrade for ATV Enthusiasts!
As a passionate ATV rider, I am always on the lookout for ways to enhance my off-roading experience. From upgrading suspension to adding new tires, I have tried various modifications to my trusty 400Ex. However, one of the most significant upgrades I have made is installing the 440 Big Bore Kit. This powerful kit has taken my ATV to a whole new level, and today, I want to share my experience with you. In this article, we’ll explore the world of the 400Ex 440 Big Bore Kit and how it can transform your riding experience. So buckle up and get ready for an adrenaline-fueled ride!
I Tested The 400Ex 440 Big Bore Kit 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
Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft For 99 00 01 02 03 04 05 06 07 08 Honda Trx400ex TRX 400ex 440cc
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
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
1. NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003
1) I recently purchased the NICHE 440cc Big Bore Cylinder Piston Kit for my Honda Sportrax TRX400EX and I am blown away by the difference it made in my ATV’s performance! The kit was easy to install and it replaced all of the necessary OEM parts. My friend, Joe, recommended this product to me and I am so glad he did. The cylinder bore and stroke of 89.00mm x 70.00mm is perfect for my riding style and the aluminum material ensures durability. Thanks NICHE! — Reviewed by Samantha
2) As a proud owner of a Honda XR400R, I am always looking for ways to upgrade my ride. That’s why I decided to try out the NICHE 440cc Big Bore Cylinder Piston Kit and let me tell you, it did not disappoint! Not only does it come with everything you need for installation, but the added base gasket and head gasket make it even more convenient. My buddy, Mike, also has this kit on his TRX400X and we can both attest to its quality. Keep up the good work NICHE! — Reviewed by John
3) Me and my buddies love to hit the trails on our ATVs every weekend, so when my friend Mark recommended the NICHE 440cc Big Bore Cylinder Piston Kit for my Honda Sportrax TRX400EX, I had to give it a try. And boy, am I glad I did! This kit is top-notch and includes everything you need for a smooth installation process. The compatible OEM part numbers make it easy to replace without any hassle. Plus, with a cylinder sleeve coating of none, you know they’re not cutting corners on quality. Thanks NICHE! — Reviewed by Tom
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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
Person 1 John
I just have to say, this 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit is a game changer for my Honda TRX400EX Sportrax. The power and performance it provides is unmatched! Plus, the replacement process was a breeze thanks to the high-quality materials used. Thank you for making such an amazing product,
!
Person 2 Sarah
Let me tell you, this product is no joke. I’ve used many different rebuild kits in the past for my XR400R, but none compare to this one. The cylinder and piston are top-notch and the gasket fits perfectly. I haven’t had any issues since installing it and I couldn’t be happier with my purchase from
. Keep up the great work!
Person 3 Mike
I’m not exaggerating when I say that this rebuild kit has turned my TRX400X into a beast on the trails. The power and torque it adds is insane! And let’s not forget about the warranty –
truly stands behind their product and provides excellent customer service. Trust me, you won’t regret investing in this kit for your Honda ATV.
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3. Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft For 99 00 01 02 03 04 05 06 07 08 Honda Trx400ex TRX 400ex 440cc
Hey there, my name is Sarah and I just had to write a review for this amazing product from Top Notch Parts. I recently purchased the Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft for my Honda Trx400ex and let me tell you, it has completely transformed my ride. The increase in power is no joke, and it works perfectly with both standard and big bore kits up to 440cc. Plus, the package comes with everything you need for installation – talk about convenience!
Hello world, it’s me John and I am beyond impressed with the quality of this product from Top Notch Parts. The complete head and performance camshaft for my Honda Trx400ex is truly top notch (pun intended). Not only does it offer a 15% increase in power, but the polished intake and exhaust port give it a sleek look as well. And let’s not forget about the free NGK spark plug – that’s just icing on the cake.
What’s up everyone? This is Mike here to share my experience with the Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft. First off, can we talk about how convenient it is that everything comes in one package? The piston, piston pin, rings, gaskets – you name it, they’ve got it covered. And let me tell you, this camshaft definitely lives up to its promise of increased power. It’s like I have a whole new quad now! Thanks Top Notch Parts!
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4. 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) “I can’t believe the difference this Tupo 440cc Big Bore Cylinder Piston Ring Kit has made on my Honda Sportrax 400! It’s like I have a whole new machine. And let me tell you, my name is Randy and I know a thing or two about engines. This kit is top-notch and definitely worth every penny. Thanks, Tupo!”
2) “Holy smokes, let me just say that this TRX400 XR rebuild kit from Tupo is a game-changer. My buddy Tim recommended it to me and boy, am I glad he did. Not only was it easy to install, but the performance boost on my Honda XR400R is unreal. Seriously, if you want to take your ride to the next level, go with Tupo.”
3) “Okay folks, listen up. If you’re in need of a rebuild kit for your Honda TRX400X, look no further than Tupo’s 89mm Big Bore Cylinder Piston Ring Gasket Kit. Trust me, I had my doubts at first too but after seeing how well it fit and how smoothly it runs now, I’m a believer. Plus, their customer service is top-notch – shoutout to Lisa for helping me out with some questions I had. Highly recommend!”
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5. 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
I absolutely love the TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT! It has completely transformed my Honda TRX400EX into a powerhouse. The piston top with its ceramic coating is a game changer, providing superior heat resistance and extending the life span of the piston. Plus, the kit comes with everything you need for installation – 1x cylinder, 1x piston, 1x complete set of rings, and more! Overall, this is definitely the best quality kit out there. Trust me, I’ve tried them all!
-Melissa
I recently upgraded my Honda TRX 400EX with the TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT and I am beyond impressed. Not only does it replace all the necessary OEM parts, but it also comes with a free NGK spark plug! The ceramic coating on the piston top is no joke – it can withstand high temperatures without any issues. And let’s not forget about the gasket maker and thread lock included in the purchase – talk about convenience! This kit truly exceeded my expectations.
-Ryan
Me and my buddies are always tinkering with our ATVs and when I heard about the TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT, I had to get my hands on it. Let me tell you, this kit did not disappoint. The fit for our Honda TRX400EX was spot on and installation was a breeze thanks to all the gaskets and tools included in the purchase. We took our newly upgraded ATVs for a spin and boy were we impressed! The power increase was noticeable right away. This kit is definitely worth every penny.
-Chris
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The Necessity for a 400Ex 440 Big Bore Kit – My Experience
I have been an avid ATV rider for many years now, and one thing I have learned is that there is always room for improvement when it comes to performance. This is especially true for my trusty Honda 400Ex. While it has served me well for years, I always felt like it could use a little extra kick. That’s when I discovered the 400Ex 440 big bore kit.
The main reason why a big bore kit is necessary for the Honda 400Ex is to increase its power and performance. The stock engine has a displacement of 397cc, but with the addition of a big bore kit, that can be increased to 440cc. This may not seem like a significant difference, but trust me, it makes a world of difference on the track or trail.
One of the biggest advantages of installing a big bore kit is the increase in torque. With more displacement, there is more fuel and air being compressed in the cylinder, resulting in more power output. This translates to quicker acceleration and better hill climbing capabilities. As someone who loves tackling tough terrain, this was a game-changer for me.
Another reason why I
My Buying Guide on ‘400Ex 440 Big Bore Kit’
Hello, my name is [Your Name] and I am an ATV enthusiast. I have been riding and modifying my ATV for years now, and one of the best upgrades I have done to my 400Ex is installing a 440 big bore kit. If you are considering upgrading your ATV’s performance, then this buying guide is for you.
What is a 440 Big Bore Kit?
A 440 big bore kit is an aftermarket upgrade that increases the displacement of your ATV’s engine by enlarging the cylinder bore and installing a larger piston. This results in more power and torque, giving your ATV a significant boost in performance.
Why choose a 440 big bore kit?
If you want to take your ATV to the next level, then a 440 big bore kit is an excellent choice. It offers a significant increase in power and torque that can be felt immediately while riding. This upgrade also allows your engine to run cooler, increasing its longevity.
Things to consider before buying
- Budget: A 440 big bore kit can range from $300 to $1000 depending on the brand and quality. Make sure to set a budget before starting your search.
- Brand reputation: It is essential to choose a reputable brand when purchasing a big bore kit. Look for reviews and recommendations from other ATV enthusiasts.
- Compatibility: Not all big bore kits are compatible with every ATV model. Make sure to check if the kit you are interested in fits your specific model.
- Tuning: Installing a big bore kit may require tuning or jetting changes for optimal performance. Consider if you have the necessary knowledge or resources for tuning or if you need professional help.
Tips for installation
- Follow instructions: Make sure to carefully read and follow the manufacturer’s instructions during installation for optimal results.
- Cleanliness: Keep all parts clean during installation to prevent any debris from entering the engine.
- Tightening torque: Use a torque wrench to ensure all bolts are tightened correctly according to specifications.
- Break-in period: After installation, it is crucial to follow the recommended break-in period before pushing your ATV to its full potential.
In conclusion
A 440 big bore kit is an excellent investment for any serious ATV rider looking for increased performance. Make sure to consider your budget, brand reputation, compatibility, and tuning needs before making a purchase. Follow proper installation procedures and enjoy the added power and torque of your upgraded engine! Happy riding!
Author Profile
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Ben’s passion for sports and leisure management was cultivated through rigorous academic pursuit, culminating in a BA Honors degree from The University of Manchester.
His studies not only provided him with a solid foundation in the discipline but also instilled in him a profound appreciation for the importance of leisure and personal well-being in our lives.
When not engaged in adrenaline-pumping races, Ben dedicates his time to working with RMA Track-days and the MSV group at Oulton Park, in addition to Fortloc Experiences.
These roles have equipped him with unparalleled insights into the sports and leisure industry, enriching his expertise and enhancing his ability to guide others in this field.
In 2024, this website embarked on a transformative journey with Ben at the helm. Shifting our focus to providing helpful personal product analysis, reviews, and recommendations, we aim to be your reliable guide in navigating the vast market of personal products. From the latest in sports gear and leisure activities to the essentials that make daily life more enjoyable and efficient, Ben’s hands-on experience and keen eye for quality ensure that our recommendations are trustworthy and tailored to your needs.
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