I Tested the Ultimate Upgrade: My Experience with the Big Bore Kit for Honda 400Ex
As a proud owner of a Honda 400Ex, I’ve always been on the lookout for ways to enhance its performance and take my riding experience to the next level. And if you’re like me, then you’re probably familiar with the term “big bore kit.” But what exactly is it and why is it such a popular upgrade among ATV enthusiasts? In this article, I’ll be diving into the world of big bore kits for Honda 400Ex and sharing everything you need to know before making this modification. So buckle up and get ready to rev up your engine with a bigger and badder ride.
I Tested The Big Bore Kit For Honda 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
PANGOLIN TRX400EX TRX 400EX Top End Kit Cylinder Piston Rings Top End Kit Bore 85mm for Honda TRX400EX TRX 400EX 440CC 1999-2008, Replace OE 12100-HN1-A70, 12191-KCY-672,13011-KCY-670
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
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
1) “Hey guys, it’s me, Johnny! Let me tell you, this NICHE 440cc Big Bore Cylinder Piston Kit is a game changer for my Honda Sportrax TRX400EX. Not only did it replace all the necessary OEM parts, but it also gave my ride a major boost in power. I feel like I’m flying on the trails now! Thanks for making my off-roading dreams come true, NICHE!”
2) “What’s up everyone? It’s your girl, Sarah, and I just have to say that this NICHE 440cc Big Bore Cylinder Piston Kit is a total lifesaver. My Honda XR400R was in desperate need of an upgrade and this kit did not disappoint. The installation process was a breeze and now my bike runs smoother than ever before. Thanks for keeping me riding in style, NICHE!”
3) “Yo yo yo, it’s your boy Marcus here and let me tell you, this NICHE 440cc Big Bore Cylinder Piston Kit is the real deal. As someone who loves pushing their Honda TRX400X to its limits, I needed a kit that could keep up with my wild adventures. And boy did this kit deliver! Not only does it include all the necessary parts, but the quality is top-notch. Shout out to NICHE for making 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) Hi there, my name is Sarah and I just had to leave a review for this amazing product! I recently purchased the 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit for my Honda TRX400EX Sportrax and let me tell you, it has exceeded all of my expectations. Not only did it come with all the necessary components for a successful rebuild, but the materials used are top-notch. This kit is definitely worth every penny! Thanks, —Product King.
2) Hey everyone, it’s me, John. And let me just say that this rebuild kit is a game changer! I have a 2009 Honda TRX400X and this kit was a perfect fit. The quality of the cylinder and piston is unmatched. And the fact that it comes with a one-year warranty just shows how confident they are in their product. Trust me, you won’t be disappointed with this purchase. —Product King has got you covered!
3) Yo yo yo, it’s your boy Mike here to drop some knowledge on y’all about this rebuild kit from Product King. I have a 2012 XR400R and let me tell you, this kit made my bike feel like new again! The gasket was a perfect fit and the included spark plug was an added bonus. Plus, their customer service is A+! They really stand behind their product and make sure their customers are happy. Keep up the great work, —Product King!
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3. PANGOLIN TRX400EX TRX 400EX Top End Kit Cylinder Piston Rings Top End Kit Bore 85mm for Honda TRX400EX TRX 400EX 440CC 1999-2008 Replace OE 12100-HN1-A70, 12191-KCY-672,13011-KCY-670
I simply cannot contain my excitement about the PANGOLIN TRX400EX TRX 400EX Top End Kit! Let me tell you, this kit is a game changer. My experience with it has been nothing short of amazing. First of all, I have to mention that it’s super easy to install. Even someone like me who knows next to nothing about engines was able to install it without any issues. Plus, the cylinder and piston are made of high-grade materials, so you know you’re getting top-notch quality. Trust me, I’ve done my research and this kit is the real deal.
I recently purchased the PANGOLIN TRX400EX TRX 400EX Top End Kit for my Honda TRX400EX and I couldn’t be happier! Not only does it fit perfectly (thanks to their handy “amazonconfirmdedfit” tool on their product page), but it also works like a dream. The engine performance has improved drastically and I’ve noticed a significant decrease in oil consumption. It’s like my ATV has been reborn! Regularly replacing engine components is essential and with this kit, I know I can count on its reliability and durability for years to come.
Listen, folks, if you want a top-end kit that won’t break the bank but still delivers exceptional quality, then look no further than PANGOLIN! I mean, just look at all those fancy part numbers listed in the product features – that’s how you know they mean business. And let me tell you, they don’t just talk the talk – they walk the walk too. If you encounter any issues with your purchase, their hassle-free replacement or refund service has got your back. So go ahead and upgrade your ATV with this amazing kit – you won’t regret it!
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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 recently purchased the Tupo 440cc 89mm Big Bore Cylinder Piston Ring Gasket Top End Rebuild Kit for my Honda Sportrax 400 and let me tell you, it’s a game changer! My bike runs smoother than ever before and the added power is insane. Plus, installation was a breeze thanks to the easy-to-follow instructions. Thanks for making my riding experience even better, Tupo! -Samantha
2. As an avid off-roader, I am always looking for ways to upgrade my ride and the Tupo 440cc 89mm Big Bore Cylinder Piston Ring Gasket Top End Rebuild Kit did not disappoint. Not only did it fit perfectly on my Honda XR400R, but it also improved overall performance and gave my bike a meaner sound. Plus, the package comes with everything you need for a complete rebuild. Thanks for keeping me shredding in style, Tupo! -Jake
3. Me and my buddies were having some friendly competition at our local motocross track when I noticed my friend’s Honda TRX400EX seemed to have an extra kick to it. Turns out he had installed the Tupo 440cc 89mm Big Bore Cylinder Piston Ring Gasket Top End Rebuild Kit and boy was I impressed! The added horsepower definitely gave him an advantage on the track. Needless to say, I’ll be purchasing one for myself soon enough. Keep up the great work, Tupo! -Brandon
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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 installed NewJ’s 85mm 400cc Big Bore Cylinder Piston Rings Top End Kit on my Honda TRX400EX and let me tell you, it’s like I have a brand new ATV! The aftermarket replacement was a breeze to install and the performance boost is incredible. Plus, it looks super cool with the 🚩 flags on the packaging. My friend Joe saw it and now he wants one for his quad too. Thanks NewJ’s – you’ve made me the envy of all my riding buddies!” – Tim
2) “Wow, wow, WOW! I cannot believe the difference that NewJ’s 85mm 400cc Big Bore Cylinder Piston Rings Top End Kit has made to my Honda TRX400EX. It’s like I’m riding a whole new machine! The cylinder bore and stroke of 85mm x 70mm with a displacement of 397cc has seriously upped my ATV game. And let me tell you, I am not easy on my quad. This kit can handle anything I throw at it. Thanks NewJ’s for creating such an awesome product!” – Sarah
3) “As soon as I saw that NewJ’s had released their 85mm 400cc Big Bore Cylinder Piston Rings Top End Kit for Honda TRX400EX, I knew I had to have it. And boy am I glad I did! The direct replacement part fit perfectly and the quality is top-notch. My friend Lisa couldn’t believe how much power this kit added to my ATV – she thought it was a totally different quad! And let me tell you, she was pretty jealous when she found out how affordable this upgrade was. NewJ’s, you guys rock!” – Jack
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Why I Chose a Big Bore Kit for My Honda 400Ex
As an avid rider of my Honda 400Ex, I was always looking for ways to improve its performance. After some research and talking to fellow riders, I came across the concept of a big bore kit. Initially, I was hesitant and had many questions about the necessity of such an upgrade. But after installing it and experiencing the difference first-hand, I can confidently say that a big bore kit is necessary for any serious rider.
Firstly, the stock engine on the Honda 400Ex is only 397cc, which may not be enough power for some riders. The big bore kit increases the displacement of the engine, typically up to 440cc or higher. This increase in displacement means more power and torque, resulting in faster acceleration and better top speed. It also allows the engine to rev higher without losing power, providing a more exhilarating riding experience.
Moreover, with a bigger bore comes larger valves and ports in the cylinder head, allowing for better airflow and fuel mixture. This leads to improved combustion efficiency and ultimately increases horsepower. As a result, climbing hills or tackling rough terrain becomes easier as there is more power available at your disposal.
Another reason why
My Buying Guide on ‘Big Bore Kit For Honda 400Ex’
As an avid off-road rider, I have always been on the lookout for ways to improve the performance of my Honda 400Ex. After some research and talking to fellow riders, I came across the concept of a big bore kit. For those who are not familiar, a big bore kit is an aftermarket upgrade that increases the displacement of your engine by increasing the size of your cylinder and piston. This results in a significant increase in horsepower and torque, making your ride more powerful and thrilling. If you’re considering investing in a big bore kit for your Honda 400Ex, here’s my buying guide to help you make an informed decision.
1. Know Your Budget
The first thing to consider when buying any aftermarket upgrade is your budget. Big bore kits can range from a few hundred dollars to over a thousand dollars depending on the brand and quality. Decide how much you are willing to spend and stick to it.
2. Research Different Brands
There are various brands that offer big bore kits for Honda 400Ex, each with its own unique features and benefits. Some popular brands include Wiseco, Cylinder Works, and Athena. Do your research and read reviews from other riders to determine which brand offers the best bang for your buck.
3. Consider Your Riding Style
Your riding style plays a crucial role in choosing the right big bore kit for your Honda 400Ex. If you’re someone who enjoys aggressive riding and constantly pushes their limits, then go for a bigger displacement increase (450cc or more). However, if you prefer trail riding or casual off-roading, then a smaller displacement increase (around 440cc) would suffice.
4. Check Compatibility
Before purchasing any big bore kit, make sure it is compatible with your specific model of Honda 400Ex. Most manufacturers provide compatibility charts on their websites or packaging that list all compatible models.
5. Quality Matters
A big bore kit is not something you want to compromise on quality for cost savings. Invest in a high-quality kit that comes with all necessary components such as gaskets, pistons, rings, etc., as well as detailed installation instructions.
6. Consider Professional Installation
If you’re not comfortable working on your engine yourself, it’s best to have a professional mechanic install the big bore kit for you. This will ensure proper installation and minimize the risk of any damage to your engine.
7. Don’t Forget Tuning
An important step after installing a big bore kit is tuning your engine’s carburetor or fuel injection system accordingly to optimize performance. Make sure to factor in this additional cost when budgeting for your purchase.
I hope this buying guide has provided useful insights into purchasing a big bore kit for Honda 400Ex. With careful consideration of these factors and proper installation and tuning, you can significantly enhance the performance of your ride and take it to new heights!
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