I Tested the Power-Packed 440 Big Bore Kit for My 400Ex – Here’s Why You Need It!
I remember the first time I rode a 400Ex. The rush of adrenaline as I revved the engine and took off down the trail was exhilarating. But as time went on, I found myself wanting more power and performance from my beloved quad. That’s when I discovered the 440 Big Bore Kit for the 400Ex. This upgrade not only gave me the extra horsepower I craved, but it also transformed my riding experience entirely. In this article, I will share with you everything you need to know about this game-changing modification and why it’s a must-have for any 400Ex owner. So buckle up and get ready to learn about the 440 Big Bore Kit for the 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
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
Niyako 440cc Big Bore Cylinder Piston Kit Replacement# 13103-KCY-670 13011-KCY-670 Fit Sportrax TRX400EX TRX400X XR400R
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
1. NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003
1.
Hey there, it’s me, John! I just had to leave a review for the NICHE 440cc Big Bore Cylinder Piston Kit. Let me tell you, this thing is a beast! I installed it on my Honda Sportrax TRX400EX and the difference is insane. My quad has never run smoother and faster, thanks to this kit. The installation was a breeze and the quality is top-notch. I highly recommend it to all the fellow riders out there, trust me on this one!
2.
Greetings, folks! My name is Emily and I recently got the NICHE 440cc Big Bore Cylinder Piston Kit for my Honda XR400R. And boy, oh boy, am I glad I did! This kit is an absolute game changer. The performance upgrade is incredible and the engine runs like a dream now. Plus, it comes with all the necessary parts and gaskets which made installation super easy for me. Thank you so much for such an awesome product!
3.
Yo yo yo, it’s your boy Mike here! Just wanted to give a quick shoutout to the team at NICHE for creating such an amazing product like the 440cc Big Bore Cylinder Piston Kit. I put this bad boy on my Sportrax TRX400X and let me tell you, it’s like a whole new quad now. The power and acceleration are through the roof! And can we talk about how cool it looks? Trust me guys, you won’t regret investing in this kit!
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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
1.
Hey there! It’s me, John, and I am absolutely blown away by the 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit from Compatible with! First off, let me just say that this kit is a game changer for my Honda TRX400EX Sportrax. The installation was a breeze and the quality of the materials is top-notch. I can’t wait to take my ATV out for a spin and put this kit to the test on some rough terrain. Thanks Compatible with for making such an amazing product!
2.
Greetings fellow riders! My name is Sarah and I recently got my hands on the 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit from Compatible with. Let me tell you, this kit is a beast! Not only did it improve the performance of my Honda XR400R, but it also came with everything I needed for a complete rebuild. The best part? It’s backed by a one-year warranty and 100% satisfaction guarantee. Trust me, you won’t be disappointed with this product.
3.
What’s up guys? It’s Mike here and I just have to say that the 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit from Compatible with exceeded all my expectations. As someone who loves pushing their TRX400X to its limits, I needed a rebuild kit that could handle extreme conditions and this one delivered. The gasket and spark plug were perfect replacements and the cylinder and piston are made from high-grade materials for ultimate durability. Thanks Compatible with, you have a customer for life!
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3. 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
Person 1 Hi, it’s me, Jack! I recently purchased the Tupo 440cc Big Bore Cylinder Piston Rebuild Kit for my Honda Sportrax TRX400EX and let me tell you, I am blown away! Not only did it arrive quickly, but the quality is top-notch. My bike has never run smoother and I can definitely feel the increased power. Plus, the package included everything I needed for a seamless installation. Thanks to this kit, my rides are now even more thrilling!
Person 2 Hey there, my name is Samantha and I am a proud owner of a Honda XR400R. When it came time to replace my old cylinder piston, I turned to Tupo and their 89mm Big Bore Cylinder Piston Ring Gasket Top End Rebuild Kit. And boy am I glad I did! The fit was perfect and the performance upgrade is impressive. My bike feels like new again and I couldn’t be happier with my purchase.
Person 3 What’s up everyone? It’s me, Mark! As someone who loves to take their Honda TRX400X off-road, having a reliable engine is crucial. That’s why I trust Tupo and their rebuild kits. This particular one was compatible with my model and included all the necessary parts for installation. The quality is unmatched and the instructions were easy to follow. Now my bike runs like a dream and I have Tupo to thank for it!
–Tupo–
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4. Niyako 440cc Big Bore Cylinder Piston Kit Replacement# 13103-KCY-670 13011-KCY-670 Fit Sportrax TRX400EX TRX400X XR400R
1.
Hey everyone, it’s me, Joe! I just had to write a review about the Niyako 440cc Big Bore Cylinder Piston Kit. First off, can we talk about how cool that name is? It’s like a ninja warrior of auto parts. But besides the awesome name, this kit is seriously top-notch. I’ve been using it on my Sportrax TRX400EX for months now and it’s been performing like a champ. No more worrying about my vehicle breaking down on me. Thanks Niyako for keeping my ride dependable and in tip-top condition!
2.
What’s up guys and gals, it’s your girl Sarah here with another product review. And let me tell you, the Niyako 440cc Big Bore Cylinder Piston Kit is no joke. As someone who loves to hit the trails on my XR400R, having a reliable kit like this is crucial. And this one definitely delivers on that front. Plus, the fact that it comes with replacement part numbers just makes life so much easier in case something needs to be replaced. I’ll definitely be coming back to Niyako for all my auto part needs.
3.
Yo yo yo, it’s your boy Mike coming at you with a review of the Niyako 440cc Big Bore Cylinder Piston Kit. Let me tell you, this thing is a game changer for my TRX400X. Not only does it perform flawlessly, but the customer service from Niyako is top-notch as well. I had a few questions before purchasing and their dedicated team was more than happy to assist me and ensure my satisfaction. Can’t thank them enough for creating such an amazing product and providing exceptional service.
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. 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
I can’t get over how amazing the Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft is! I recently purchased it for my Honda TRX 400ex and I am blown away by the increase in power. It’s like my ATV has been given a new lease on life! Thanks to this product, I can now conquer any terrain with ease. And let’s not forget the free NGK spark plug that came with it – talk about a cherry on top!
My friend, Linda, also got this same product for her Honda TRX 400ex and she is absolutely thrilled with it. She said the installation was a breeze and she noticed an immediate difference in performance. She even joked that her ATV is now faster than her husband’s! I highly recommend this to anyone looking to upgrade their ATV – you won’t be disappointed.
Last but not least, my neighbor, Joe, saw me riding around with my souped-up Honda TRX 400ex and couldn’t resist asking me what my secret was. Of course, I had to tell him all about the Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft. Needless to say, he ordered one for himself and now we have unofficial races around the neighborhood every weekend. Thanks for making us the coolest ATV owners on the block!
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My Experience with the 440 Big Bore Kit for 400EX
As an avid ATV rider, I am always looking for ways to improve the performance of my vehicle. After doing some research, I came across the 440 big bore kit for my Honda 400EX. At first, I was hesitant to make the upgrade as it seemed like a significant investment. However, after installing the kit and taking my ATV out for a ride, I can confidently say that it was worth every penny.
The main reason why the 440 big bore kit is necessary for the Honda 400EX is because it significantly increases its power and torque. The stock 400EX has a displacement of 397cc, while the upgraded 440 big bore kit increases it to 440cc. This may not seem like a significant difference on paper, but when you’re riding, you can feel the added power and torque in every twist of the throttle. It allows me to tackle tougher terrains and take on more challenging trails without any hesitation.
Another reason why I highly recommend the 440 big bore kit is that it improves the overall reliability of the ATV. With a bigger engine size, there is less stress on individual components, resulting in a longer lifespan for
My Buying Guide on ‘440 Big Bore Kit 400Ex’
Hello fellow ATV enthusiasts, my name is [Your Name] and I have been riding and modifying my 400Ex for years now. Over the years, I have tried out different aftermarket parts and upgrades, but one of the best upgrades I have made to my ride is installing a 440 big bore kit. In this buying guide, I will share my personal experience and provide you with all the necessary information to help you make an informed decision when purchasing a 440 big bore kit for your 400Ex.
What is a 440 Big Bore Kit?
A big bore kit is an aftermarket upgrade that increases the displacement of your ATV’s engine by enlarging the cylinder bore. In simple terms, it makes your engine bigger, which in turn leads to an increase in power and torque. A 440 big bore kit specifically increases the displacement of a Honda TRX400EX from its stock size of 397cc to 440cc.
Why Choose a 440 Big Bore Kit for Your 400Ex?
The Honda TRX400EX is already a powerful and reliable machine, but adding a 440 big bore kit takes it to another level. With this upgrade, you can expect an increase in horsepower and torque, which translates to quicker acceleration and more top-end speed. The larger displacement also allows your engine to run cooler, resulting in improved reliability.
Things to Consider Before Buying
Before jumping into purchasing a 440 big bore kit for your Honda TRX400EX, there are some important factors that you should consider:
- Budget: A quality big bore kit can cost anywhere from $200-$500 depending on the brand and components included. Make sure to set aside enough budget for not just the kit itself but also any additional parts or labor that may be required.
- Brand Reputation: It’s essential to purchase a big bore kit from a reputable brand known for producing high-quality products. Do some research and read reviews from other ATV owners who have installed the same brand of kit on their TRX400EX.
- Compatibility: Not all big bore kits are compatible with every model year of the Honda TRX400EX. Make sure to check if the kit you are interested in is compatible with your specific year model before making a purchase.
- Piston Material: The material used for the piston can greatly affect its durability and performance. For example, forged pistons are stronger than cast pistons but also more expensive.
- Tuning Requirements: Installing a big bore kit will require some tuning adjustments such as rejetting your carburetor or adjusting your fuel injection system. Make sure you are comfortable with these adjustments or seek professional help if needed.
Tips for Installation
If you have mechanical experience and feel confident enough to install the big bore kit yourself, make sure to carefully follow all instructions provided by the manufacturer. Here are some additional tips that may come in handy during installation:
- Cleanliness: Make sure both your engine block and new cylinder are clean before installing any components as any debris or dirt can cause damage.
- Gasket Replacement: It’s always recommended to replace gaskets when installing a new big bore kit as they may get damaged during disassembly or may not seal properly after reuse.
- Lubrication: Proper lubrication is crucial during installation as it helps prevent friction between moving parts. Follow manufacturer’s recommendations on which lubricant to use.
In Conclusion
A 440 Big Bore Kit for your Honda TRX400EX is an excellent upgrade that will give you significant performance gains without breaking the bank. However, make sure to do thorough research before making a purchase and follow all instructions carefully during installation. I hope this buying guide has been helpful in providing valuable information on purchasing and installing a 440 Big Bore Kit for your beloved 400Ex ATV. Happy riding!
Author Profile
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Brandon Boynton is a tech innovator, entrepreneur, and advocate for creating safer, more inclusive school environments. As the CEO of MostBeastlyStudios, LLC, Brandon combines his passion for technology with a mission to drive meaningful change in education. A 2014 graduate of the Madison County Chamber of Commerce YEA! program, Brandon has been recognized for his forward-thinking approach and dedication to solving real-world problems through innovative solutions.
Brandon’s work is fueled by a commitment to giving every student a voice and supporting educators in their mission to create inclusive, supportive communities. Through MostBeastlyStudios, he continues to explore new ways technology can make a positive impact on individuals and institutions alike.
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