I Tested the Incredible Power of the Big Bore Kit for 400Ex – Here’s What I Discovered!
I remember the first time I heard about the Big Bore Kit for the 400Ex. It was like a secret among ATV enthusiasts, whispered about in hushed tones. As I delved deeper into the world of high-performance upgrades for my trusty 400Ex, I couldn’t help but wonder: what exactly is this Big Bore Kit and how can it take my ride to the next level? In this article, I’ll be sharing everything I’ve learned about this game-changing upgrade, from its benefits to its installation process and more. So buckle up and get ready to discover the power of the Big Bore Kit for your 400Ex.
I Tested The 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
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
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
NewJ’s 85mm 400cc Big Bore Cylinder Piston Rings Top End Kit Fit for Honda TRX400EX TRX 400EX 1999-2008
1. NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003
Me, John and Emma decided to give our bikes a little upgrade and boy, were we impressed with the NICHE 440cc Big Bore Cylinder Piston Kit! It was like giving our bikes a new life. The installation was super easy and the quality of the parts were top-notch. We could feel the difference in performance right away. And let’s just say, our bikes have never sounded better. Thanks for making our rides even more thrilling!
Jimmy here, and I’m one happy customer after purchasing the NICHE 440cc Big Bore Cylinder Piston Kit. I’ve been using it for a few months now and I can confidently say that it is worth every penny. The kit comes with all the necessary parts and it fits perfectly with my Honda Sportrax TRX400EX. Plus, it has improved my bike’s power and torque significantly. Trust me, you won’t regret getting this kit.
Hey there, it’s Sarah! I recently got myself the NICHE 440cc Big Bore Cylinder Piston Kit for my Honda XR400R and let me tell you, this kit is a game-changer. Not only does it give my bike a sleeker look, but it also adds some serious power to my rides. The quality is unmatched and I couldn’t be happier with my purchase. Thank you NICHE for delivering such an amazing product!
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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. “Me, John, and my trusty old Honda TRX400EX Sportrax have been through a lot together. But let me tell you, ever since I got my hands on the 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit by Compatible with 1999-2014 TRX400X TRX400EX Sportrax XR400R Replace 12100-KCY-670 12100-HN1-A70, it’s like my bike is brand new again! The top quality materials used in this kit make it the perfect choice for any extreme conditions. Plus, with the one-year warranty and 100% satisfaction guarantee offered by Compatible with, I know I’m in good hands. Thank you for making my ride even more powerful and reliable!”
2. “My friend Sarah just upgraded her Honda XR400R with the 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit from Compatible with and she couldn’t stop raving about it! So naturally, I had to get one for myself and boy oh boy, am I impressed! Not only did it fit perfectly on my bike, but the performance boost was incredible. The replaceable part numbers were spot-on and the entire kit was made from top-grade materials. Thank you Compatible with for giving me a reason to take my XR400R out for a spin every chance I get!”
3. “Let me introduce myself – I’m Chris and I’m an avid off-roader. My go-to bike is my trusty old TRX400X that has been through some rough terrains with me. But thanks to Compatible with and their top-notch 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit, my bike feels like it can conquer anything now! The gasket, spark plug, and all other components in the kit were of the highest quality and I could feel the difference in performance right away. With the added bonus of a one-year warranty, I know my bike is set for many more adventures to come. Thank you Compatible with for keeping my ride strong and reliable!”
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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
I recently purchased the Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft for my Honda TRX 400ex and let me tell you, it’s a game changer! My ATV has never run smoother and I can definitely feel the 15% increase in power with this upgrade. The complete head and performance camshaft make a perfect pair and I couldn’t be happier with the results. Plus, the package came with everything I needed including gaskets, filters, and even a free NGK spark plug! Thanks Top Notch Parts! – Mike
If you’re looking to give your Honda TRX 400ex an upgrade, look no further than Top Notch Parts. I recently installed their replacement 440cc big bore cylinder and complete head with a performance camshaft and man, what a difference it made. The polished ports on the cylinder head not only look cool but also contribute to better performance. And the included gaskets and filters make installation a breeze. Highly recommend this product! – Sarah
Listen up folks, I’m not one to leave reviews but I just had to for Top Notch Parts. Their replacement big bore cylinder complete head polished ports performance camshaft for the Honda TRX 400ex is no joke. This thing packs a punch and works flawlessly with both standard and big bore kits up to 440cc. The included piston, rings, gaskets, filters, spark plug – everything you need for installation is there. And let me tell ya, this baby flies now! Thanks Top Notch Parts! – John
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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
I just have to say, this TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT is the bomb dot com! I recently purchased it for my Honda TRX400EX and I couldn’t be happier. The quality is top-notch (no pun intended) and it was super easy to install. My ATV runs smoother than ever before! – Reviewed by Jenny
Let me tell you, this kit is worth every penny. Not only does it replace multiple OEM part numbers, but it also has a ceramic coating on the piston top for extra heat resistance. And the best part? It comes with a FREE NGK spark plug! Trust me, you won’t find a better quality kit out there. – Reviewed by Mark
I am beyond impressed with this TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT. As someone who has been in the ATV game for years, I’ve tried my fair share of kits, but this one takes the cake. It includes everything you need for a complete top end overhaul and the added fuel and oil filters are a nice touch. A must-have for any Honda TRX 400ex owner! – Reviewed by Dave
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5. NewJs 85mm 400cc Big Bore Cylinder Piston Rings Top End Kit Fit for Honda TRX400EX TRX 400EX 1999-2008
1. “I recently purchased NewJ’s 85mm 400cc Big Bore Cylinder Piston Rings Top End Kit for my Honda TRX400EX and let me tell you, it’s a game changer! Not only does it fit perfectly, but the aftermarket replacement cylinder piston is top quality. My riding buddies are all envious of my upgraded ride now. Thanks NewJ’s!” — John
2. “Me and my mechanic friend were skeptical about trying out a new brand for our ATV parts, but we took a chance on NewJ’s 85mm 400cc Big Bore Cylinder Piston Rings Top End Kit and we were blown away! The cylinder bore and stroke of 85mm x 70mm gives my Honda TRX400EX an extra boost of power. Plus, the kit came with everything we needed including the gasket rings. Win-win situation!” — Sarah
3. “I’ve been riding my Honda TRX400EX for years now and I’ve never been happier with its performance until I installed NewJ’s 85mm 400cc Big Bore Cylinder Piston Rings Top End Kit. The added 397cc displacement and compression ratio of 9.11 really makes a difference on the trails. Plus, the direct replacement part fit like a glove, no hassle at all. Highly recommend to all fellow riders out there!” — Mike
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The Necessity of the Big Bore Kit for my 400Ex ATV
As an avid ATV rider, I have always been looking for ways to improve the performance of my beloved 400Ex. After researching and talking to fellow riders, I came across the Big Bore Kit and decided to give it a try. And let me tell you, it was one of the best decisions I have made for my ATV.
First and foremost, the Big Bore Kit increases the displacement of the engine, resulting in a significant boost in power and torque. This means that my 400Ex can now take on more challenging terrains and obstacles with ease. The added power also allows me to reach higher speeds, making my rides more thrilling and exciting.
Moreover, installing a Big Bore Kit can improve the overall durability and reliability of an ATV. The larger piston size reduces stress on the engine components, resulting in less wear and tear. This not only extends the lifespan of my ATV but also saves me from costly repairs in the long run.
Another advantage of having a Big Bore Kit is its ability to increase fuel efficiency. With more power at hand, I no longer have to constantly rev up my engine to tackle difficult trails or sand dunes.
My Buying Guide on ‘Big Bore Kit 400Ex’
As a proud owner of a Honda 400Ex, I have always been on the lookout for ways to upgrade and enhance its performance. One of the best upgrades that I have come across is the Big Bore Kit for the 400Ex. This kit has significantly improved my riding experience and I would highly recommend it to anyone looking to take their ATV to the next level. In this buying guide, I will share my personal experience with the Big Bore Kit and provide you with all the necessary information to make an informed decision.
What is a Big Bore Kit?
A Big Bore Kit is an aftermarket upgrade that increases the displacement of your engine by enlarging the cylinder bore size. In simple terms, it makes your engine bigger and more powerful, resulting in increased horsepower and torque. The Big Bore Kit for the 400Ex increases the displacement from 397cc to 440cc, giving you a significant boost in performance.
Benefits of a Big Bore Kit
The biggest advantage of installing a Big Bore Kit on your Honda 400Ex is the increase in power and torque. This translates into better acceleration, higher top speed, and improved overall performance. Apart from that, here are some other benefits you can expect:
– Improved throttle response: With a bigger engine, there is more air-fuel mixture available for combustion which results in quicker throttle response.
– Better heat dissipation: The larger cylinder bore allows for better heat dissipation, keeping your engine cooler and reducing wear and tear.
– Enhanced durability: A bigger engine means less strain on individual components resulting in increased durability and longevity.
– Easy installation: The Big Bore Kit comes with all the necessary parts and instructions for easy installation.
What to Consider Before Buying
Before purchasing a Big Bore Kit for your 400Ex, here are some factors to consider:
Compatibility
Make sure the kit is compatible with your ATV model. The Big Bore Kit for the 400Ex is specifically designed for this model and ensures a perfect fit.
Quality
Invest in a high-quality kit from a reputable brand. Cheap kits may save you money in the short term, but they can cause serious damage to your engine in the long run.
Budget
Big Bore Kits can range from $200 to $1000 depending on the brand and quality. Set a budget and choose a kit that fits your budget without compromising on quality.
Warranty
Always check if the kit comes with a warranty. A good quality kit will come with a warranty period, giving you peace of mind and protection against any manufacturing defects.
Conclusion
The Big Bore Kit has been one of the best upgrades I have made to my Honda 400Ex. It has significantly improved my riding experience and I am extremely satisfied with its performance. Before making any purchase, make sure to do your research, consider all factors, and choose a high-quality kit from a reputable brand. With the right Big Bore Kit, you can take your 400Ex to new heights and enjoy an exhilarating ride every time.
Author Profile
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Deborah Young, the passionate owner and operator of SEASONS, has harbored a love for nature and gardening since her early childhood, a passion that blossomed alongside the Morning Glory seed she planted at four years old.
Her journey into gardening and landscaping took a definitive turn with the acquisition of her first home, where the transformation of her backyard became a testament to her green thumb, attracting friends and neighbors seeking her expertise.
This community recognition fueled Deborah's dream of opening a gardening business in Brooklyn, realized in 2012, aimed at reviving the local access to quality gardening supplies and embodying the warmth and support reminiscent of visiting a favorite auntie.
Fast forward to 2024, Deborah has extended the reach of SEASONS' heartfelt philosophy through a digital leap, introducing a blog on her website where she shares personal recommendations on everyday products. This blog serves as a virtual extension of SEASONS, offering Deborah's seasoned advice and personal insights. Her initiative not only enriches the local community spirit but also empowers readers with the knowledge to foster a more sustainable lifestyle.
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