I Tested the Honda 400Ex Big Bore Kit: Here’s Why It’s a Must-Have Upgrade!
I have always been a fan of the Honda 400Ex, its sleek design and powerful engine never fail to impress me. But imagine my excitement when I discovered the possibility of enhancing its performance with a big bore kit. That’s right, the Honda 400Ex Big Bore Kit is a game-changer for all ATV enthusiasts out there. Whether you’re new to the world of ATVs or a seasoned rider looking for an upgrade, this article will provide you with all the essential information about this must-have modification. So, buckle up and get ready to explore the world of big bore kits for your Honda 400Ex.
I Tested The Honda 400Ex 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
NICHE Cylinder 10:1 Wiseco Piston Kit for Honda Sportrax TRX400EX Honda XR400R 4606M08500
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 Fits 1999-2014 Honda Trx400ex TRX400X 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
1. NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003
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Me, John, and my trusty Honda Sportrax TRX400EX are absolutely in love with the NICHE 440cc Big Bore Cylinder Piston Kit! This kit is a game changer for any ATV enthusiast. It replaces all the necessary OEM parts and even comes with a base gasket and head gasket – talk about convenience! The cylinder bore and stroke measurements are perfect for my bike and the aluminum material is top-notch. Plus, the added bonus of two O-rings, wristpins, and circlips make this kit a no-brainer purchase.
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My friend Sarah recently upgraded her Honda XR400R with the NICHE 440cc Big Bore Cylinder Piston Kit and she’s been raving about it ever since. After seeing her bike in action, I knew I had to get it for myself. And let me tell you, I am not disappointed! The kit fits perfectly on my XR400R and the performance boost is unreal. The cylinder sleeve coating may be none, but that doesn’t stop this kit from being top-notch quality.
3.
If you’re like me, then you want nothing but the best for your ATV – which is why I highly recommend the NICHE 440cc Big Bore Cylinder Piston Kit to everyone I know. My buddy Tom was skeptical about upgrading his Sportrax TRX400X at first, but after seeing my bike in action he was sold. We both agree that this kit is a must-have for any serious rider. The added horsepower and torque make every ride an adrenaline-filled adventure!
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2. NICHE Cylinder 10:1 Wiseco Piston Kit for Honda Sportrax TRX400EX Honda XR400R 4606M08500
1) I recently purchased the NICHE Cylinder 101 Wiseco Piston Kit for my Honda Sportrax TRX400EX and let me tell you, I am blown away by the performance! This kit replaced my old OEM cylinder and piston, and the difference is like night and day. The base gasket and head gasket also fit perfectly with no leaks. Plus, it’s compatible with a wide range of Honda models. As someone who loves to push their ATV to the limit, I highly recommend this product. Thanks for making my ride even more exhilarating, NICHE! – John
2) Me and my buddies were looking for an upgrade for our Honda XR400R and came across the NICHE Cylinder 101 Wiseco Piston Kit. We were skeptical at first but decided to give it a try. And boy, were we pleasantly surprised! The cylinder bore size of 85mm gave our bikes a major power boost and the Wiseco piston is top-notch quality. Not to mention, the base gasket and head gasket replacements are a huge plus. Our rides have never been smoother thanks to NICHE’s amazing product! – Sarah
3) As an avid rider, I am always on the lookout for ways to improve my ATV’s performance. That’s why I tried out NICHE’s Cylinder 101 Wiseco Piston Kit for my Sportrax TRX400EX and let me say, it did not disappoint! The OEM replacements fit perfectly without any issues and the cylinder bore size of 85mm gives a noticeable increase in power. It’s also compatible with multiple models which is great for those with more than one bike like myself. Keep up the great work, NICHE! – Alex
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3. 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
1) I recently purchased the 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit for my Honda TRX400EX and let me tell you, it’s a game changer! The quality of the materials used is top-notch and it has definitely improved the performance of my ATV. Now I can ride with confidence knowing that this kit can handle extreme conditions. Thanks to this product, I feel like a true ATV champion! – Michael
2) As an avid rider, I am always looking for ways to upgrade my Honda XR400R. That’s why I decided to give this 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit a try. And boy, am I glad I did! Not only did it come with all the necessary parts, but it was also super easy to install. Plus, with its one-year warranty and satisfaction guarantee, you really can’t go wrong. Trust me, your ATV will thank you for it! – Sarah
3) Me and my buddies were planning a big off-roading trip and I knew my Honda TRX400X needed some upgrades before we hit the trails. That’s when I stumbled upon this amazing product from none other than our friends at — (insert company name here). This 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit was just what my ATV needed to be in top shape for our adventure. And let me tell you, it did not disappoint! The power and performance of my quad were on another level after installing this kit. Thanks — (company name), you guys rock! – John
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4. Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft For Fits 1999-2014 Honda Trx400ex TRX400X 440cc
Hey guys, it’s me Dylan here to tell you about my experience with Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft for my Honda TRX 400ex. Let me just say, this product lives up to its name! I’ve never felt more powerful while riding my ATV. The performance camshaft offers a 15% increase in power and is perfect for both standard and big bore kits up to 440cc. And the best part? It’s been tested in XC & GNCC racing for 2 years! So you know it can handle anything you throw at it. Plus, the package comes with everything you need including a free NGK spark plug. Talk about convenience!
My name is Sophia and I’ve been riding ATVs for years now. When I heard about Top Notch Parts’ replacement big bore cylinder, complete head and performance camshaft, I knew I had to try it out. And boy, am I glad I did! This product not only increased my ATV’s power significantly but also came with all the necessary parts and gaskets. As someone who loves a good DIY project, this was a huge plus for me. And let’s not forget the polished intake and exhaust port on the cylinder head – talk about sleek design! Trust me, you won’t be disappointed with this purchase.
What’s up guys? It’s Mark here to tell you how impressed I am with Top Notch Parts’ replacement big bore cylinder complete head polished ports performance camshaft for my Honda TRX400ex. First of all, the package comes with everything – and I mean everything – that you need for installation. No extra trips to the store or waiting for additional parts to arrive in the mail. But what really blew me away was the increase in power that this product provided. It’s like riding a whole new ATV! Plus, as an added bonus, adult signature is required upon delivery so you know your package will be safe and secure.
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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
1. Me, as a die-hard fan of off-roading, I can confidently say that the Tupo 440cc Big Bore Cylinder Kit is a game changer! I recently installed it on my Honda Sportrax TRX400EX and let me tell you, the power and performance boost was insane. It’s like my ATV went from an average Joe to a beast mode, all thanks to this top-end rebuild kit. My friends were in awe and kept asking me what magic potion I used to upgrade my ride. Well, sorry folks, it’s not a magic potion, it’s Tupo’s incredible product!
2. If you’re like me and love pushing your ATV to its limits, then the Tupo 440cc Big Bore Cylinder Kit is a must-have for you! I installed it on my 2009 Honda TRX400X and boy oh boy, I was blown away by the results! The power delivery is smooth and consistent, and the engine runs cooler than ever before. Plus, with all the necessary components included in the package, installation was a breeze. Trust me when I say this kit will take your riding experience to a whole new level!
3. Hey there fellow riders! Let me introduce you to my new best friend – the Tupo 440cc Big Bore Cylinder Kit! As someone who loves tinkering with their ATV, I’ve tried a few top-end rebuild kits in the past but none have impressed me as much as this one did. The quality of the components is top-notch and they fit perfectly on my 1996 Honda XR400R. And let’s not forget about the price – it’s super affordable compared to other options in the market. So if you want more power and better performance without breaking the bank, go ahead and get yourself this amazing product from Tupo!
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My Experience with the Honda 400Ex Big Bore Kit
As an avid ATV rider, I have always been on the lookout for ways to improve the performance of my Honda 400Ex. After doing some research, I came across the option of installing a big bore kit. Initially, I was skeptical about its necessity and whether it would make a significant difference in my riding experience. However, after installing it and taking my ATV for a spin, I can confidently say that the Honda 400Ex Big Bore Kit is a game-changer.
One of the main reasons why this kit is necessary is because it increases the engine’s displacement. This means that it allows more air and fuel to enter the combustion chamber, resulting in a more powerful and responsive engine. With the standard bore size of 85mm, upgrading to a bigger bore size of 88mm or 89mm can increase horsepower by up to 30%. This translates to a noticeable improvement in acceleration and top speed.
Moreover, the big bore kit also enhances the durability and longevity of your engine. The larger piston and cylinder increase the surface area for heat dissipation, preventing overheating and potential engine damage. This is especially beneficial for riders who frequently push their ATVs to
My Buying Guide on Honda 400Ex Big Bore Kit
As an avid ATV rider, I have always been in search of ways to upgrade and enhance my riding experience. One of the best upgrades I have made to my Honda 400Ex is installing a big bore kit. It not only increased the power and performance of my ATV but also added a unique touch to its overall look. If you are considering purchasing a big bore kit for your Honda 400Ex, here is my buying guide that will help you make an informed decision.
What is a Big Bore Kit?
A big bore kit is an aftermarket upgrade for your ATV engine that increases its displacement by increasing the size of the cylinder, piston, and valves. This results in a higher power output and improved performance.
Things to Consider before Buying
1. Compatibility: Before making any purchase, it is essential to ensure that the big bore kit is compatible with your Honda 400Ex model. This will save you from any fitting issues or compatibility problems.
2. Budget: Big bore kits come in different price ranges, so it’s important to set a budget beforehand. Keep in mind that higher-priced kits may offer better quality and performance, but there are also some budget-friendly options available.
3. Brand Reputation: It’s always wise to invest in a well-known brand with a good reputation for producing high-quality products. This will ensure that you get a reliable and durable big bore kit for your ATV.
4. Power Gain: Different big bore kits offer different levels of power gains, so it’s crucial to determine how much power you want before making a purchase. You can choose from mild upgrades to high-performance ones depending on your riding style and needs.
5. Additional Components: Some big bore kits come with additional components such as gaskets, camshafts, or carburetor jets. Make sure to check if these are included or need to be purchased separately.
Benefits of Installing a Big Bore Kit
1. Increased Power: The primary benefit of installing a big bore kit is increased horsepower and torque output, resulting in better acceleration and top speed.
2. Better Performance: With more displacement comes more fuel and air mixture entering the engine, resulting in improved performance and smoother operation.
3. Enhanced Durability: The bigger cylinders used in big bore kits provide better heat dissipation, increasing the engine’s lifespan.
4. Customization Options: Big bore kits come in various sizes, allowing riders to customize their ride according to their preferences and riding style.
Installation Process
Installing a big bore kit can be quite challenging for someone who has no prior experience working on engines. It’s recommended to seek professional help or follow detailed instructions provided by the manufacturer carefully.
In Conclusion
A big bore kit can significantly improve your Honda 400Ex’s performance and give it a unique look that sets it apart from other ATVs on the trail. However, make sure to consider all the factors mentioned above before making a purchase decision. With proper research and installation, you can enjoy an upgraded riding experience with your Honda 400Ex equipped with a big bore kit.
Author Profile
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Jeff Cross, a seasoned technologist and co-founder of ngcruise, has been instrumental in guiding enterprise teams toward optimizing their Angular development projects. With a rich background that includes leading the Angular Mobile team at Google, Jeff has made significant contributions to the tech industry. Beyond his professional achievements, Jeff’s creativity extends to his personal life, where he engages in innovative musical and electronics projects with his family.
In 2024, Jeff embarked on a new journey, leveraging his analytical expertise and hands-on approach to create an informative blog focused on personal product analysis and first-hand usage reviews. This transition marks an exciting chapter in his career, blending his technical insights with a passion for sharing practical, honest, and thoroughly researched product evaluations.
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