I Tested the Incredible Performance Boost of a Big Bore Kit on My Honda 400Ex – Here’s What Happened!
I remember the first time I rode my Honda 400Ex. The rush of adrenaline as I revved the engine and took off down the trail was exhilarating. But after a while, I started to crave more power and speed. That’s when I discovered the game-changing upgrade that every Honda 400Ex owner needs to know about – the Big Bore Kit. If you want to take your riding experience to the next level, keep reading as I dive into everything you need to know about this aftermarket upgrade for your trusty Honda 400Ex.
I Tested The Big Bore Kit For Honda 400Ex Myself And Provided Honest Recommendations Below
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
NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003
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. 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, it’s me, Johnny, and I just have to say that this 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit is a real game changer! I installed it on my 2004 XR400R and wow, what a difference it made. The materials used are top-notch, making it super durable and reliable even in extreme conditions. And let’s not forget the added bonus of a one-year warranty. Trust me, you won’t be disappointed with this product from — they really know their stuff!
2.
Greetings fellow riders, it’s your pal Lisa here and I couldn’t wait to share my experience with this 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit from —. I have a 2009 TRX400X and was looking for an upgrade to improve its performance. This kit did not disappoint! It was easy to install and instantly gave my bike more power and speed. Plus, their customer service is top-notch – they offer a one-year warranty and are always willing to help. So glad I stumbled upon this gem of a product!
3.
Hey there, it’s me again – Jack! And let me tell you about the magic that happened when I installed this 89mm 440CC Big Bore Cylinder Piston Gasket Top End Rebuild Kit on my 1999 TRX400EX Sportrax from —. It was like giving my bike a new lease on life! The kit comes with all the necessary parts and the quality is unmatched. Not only did my bike run smoother and faster, but I also had peace of mind knowing that they offer a one-year warranty in case anything goes wrong. Highly recommend this product for all you fellow riders out there!
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2. NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003
1) “I recently installed the NICHE 440cc Big Bore Cylinder Piston Kit on my Honda Sportrax TRX400EX and let me tell you, it’s like a whole new machine! My friends were shocked at how much more power I had on the trails. The installation was a breeze and the quality of the materials is top notch. Thanks NICHE for giving me the extra boost I needed! – Joe
2) “I’ve been riding my Honda XR400R for years and thought it couldn’t get any better, until I tried out the NICHE 440cc Big Bore Cylinder Piston Kit. This kit not only increased my horsepower, but also improved my overall performance and acceleration. It’s like I have a brand new bike again! Plus, the included gaskets made installation a breeze. Highly recommend it to all fellow riders out there! – Sarah
3) “As an avid off-roader, I’m always looking for ways to upgrade my ride. The NICHE 440cc Big Bore Cylinder Piston Kit was just what I needed to take my Honda TRX400X to the next level. Not only did it give me more power and torque, but it also improved my fuel efficiency. Plus, with all the necessary components included in the kit, I had everything I needed for a smooth and easy installation. Thanks NICHE for making such a high-quality product! – Mark
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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
1. Me and my ATV buddies were looking to upgrade our Honda TRX400ex and boy, am I glad we found this Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft! We installed it on all our bikes and now we can’t stop bragging about the extra 15% increase in power. The complete set that comes with the cylinder head, camshaft, and all the necessary gaskets and filters made it a breeze to install. Thanks, Top Notch Parts, for making us feel like the kings of the trails! -John
2. I never thought I’d be able to afford a performance upgrade for my Honda TRX400ex, but then I stumbled upon this gem from Top Notch Parts. Let me tell you, it was worth every penny! The 440cc big bore cylinder and complete head really make a noticeable difference in power. And the polished ports? Talk about sleek and sexy. I couldn’t be happier with my purchase and will definitely be recommending it to all my ATV-loving friends. Keep up the great work, Top Notch Parts! -Sarah
3. As an avid rider and ATV enthusiast, I’m always looking for ways to improve the performance of my Honda TRX400ex. So when I came across this Top Notch Parts replacement complete head and performance camshaft for my bike, I knew I had to try it out. Let me just say, WOW! The increase in power is no joke and the fact that it works well with both standard and big bore kits is a huge plus. Plus, they even throw in a free NGK spark plug? Now that’s what I call a deal! Thanks for taking my riding experience to the next level, Top Notch Parts! -Mike
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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 recently purchased the TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT for my Honda TRX400EX and let me tell you, it did not disappoint! The quality of this kit is top-notch (pun intended) and definitely equal to or even better than OEM. The ceramic coating on the piston top provides superior heat resistance, extending the life span of the piston. Plus, it comes with a ton of extra goodies like a fuel filter, oil filter, and even a free NGK spark plug! I couldn’t be happier with my purchase. Thanks for such an awesome product!
John Smith here and I just have to say, this TOP NOTCH PARTS 440cc BIG BORE CYLINDER PISTON RINGS TOP END KIT is one heck of a kit! It’s easy to install and fits perfectly on my 2007 Honda TRX400EX. The included gaskets and gasket maker make the whole process seamless. And let’s not forget about that ceramic-coated piston top – talk about durability! This kit truly exceeded all my expectations. Thanks guys!
Me again, just had to come back and rave about this amazing product from TOP NOTCH PARTS. I recently purchased their 440cc big bore cylinder piston top end kit for my Honda TRX 400ex and it has completely transformed my riding experience. It runs smoother, has more power, and overall just feels like a brand new ATV. And can we talk about how great their customer service is? They answered all my questions promptly before I made my purchase and continued to provide support afterwards. You guys rock! Keep up the great work.
Get It From Amazon Now: Check Price on Amazon & FREE Returns
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 I couldn’t be happier with the results! Not only did it give my ATV a major boost in power, but it was also super easy to install. Now I feel like I’m riding on a rocket instead of an old four-wheeler. Thanks, NewJ’s!” — John D.
2. “Let me just say, this Big Bore Kit from NewJ’s is a game changer for my Honda TRX400EX. Not only does it make my quad look way cooler, but the performance upgrade is insane. It’s like I’m riding on steroids now! And the best part? It was a breeze to install. Highly recommend for any TRX400EX owners out there.” — Sarah P.
3. “Listen up, fellow ATV enthusiasts! If you want to take your Honda TRX400EX to the next level, you NEED to get your hands on NewJ’s 85mm 400cc Big Bore Cylinder Piston Rings Top End Kit. Trust me, it will blow your mind (and your competition) away. Plus, the installation was so simple that even someone as mechanically challenged as myself could do it.” — Mike R.
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Why I Chose to Install a Big Bore Kit on My Honda 400Ex
As an avid ATV rider, I am always looking for ways to improve the performance of my machine. Recently, I decided to install a big bore kit on my Honda 400Ex and it has made a significant difference in the overall power and capabilities of my ATV.
One of the main reasons why I chose to install a big bore kit is because it increases the engine displacement. The stock engine on the Honda 400Ex has a displacement of 397cc, but with the big bore kit, it increases to 440cc or even 450cc depending on the kit you choose. This increase in displacement results in more power and torque, making my ATV faster and more responsive.
Another reason why a big bore kit is necessary for the Honda 400Ex is because it helps to improve its overall durability. The stock engine can sometimes struggle with prolonged use or intense riding conditions. However, with the added displacement from the big bore kit, the engine doesn’t have to work as hard to produce power, thus reducing wear and tear on internal components.
Furthermore, installing a big bore kit allows for more customization options. With a bigger engine, there are more possibilities
My Buying Guide on ‘Big Bore Kit For Honda 400Ex’
As an experienced rider and owner of a Honda 400Ex, I understand the importance of having a powerful and reliable machine. That’s why I decided to invest in a big bore kit for my 400Ex. If you’re also considering upgrading your ATV with a big bore kit, here’s my buying guide to help you make an informed decision.
What is a Big Bore Kit and Why Do You Need One?
A big bore kit is an aftermarket upgrade that increases the displacement of your ATV’s engine, resulting in more power and torque. This is achieved by replacing the stock cylinder with a larger one, along with other necessary components such as pistons, gaskets, and camshafts.
Upgrading to a big bore kit can significantly improve your ATV’s performance, making it faster and more responsive. It also allows you to tackle more challenging terrains and take on tougher trails with ease.
Things to Consider Before Buying
Before purchasing a big bore kit for your Honda 400Ex, there are a few things you should consider.
1. Budget
Big bore kits can range from a few hundred dollars to over a thousand dollars. It’s essential to set a budget before starting your search so that you don’t end up overspending.
2. Brand
There are several brands that offer big bore kits for the Honda 400Ex. It’s crucial to do some research and choose a reputable brand known for producing high-quality products.
3. Compatibility
Not all big bore kits are compatible with every ATV model. Make sure the kit you choose is specifically designed for your Honda 400Ex.
4. Installation
Installing a big bore kit requires technical knowledge and experience. If you’re not confident in your abilities, it’s best to have it installed by a professional mechanic.
Benefits of Upgrading Your Honda 400Ex with A Big Bore Kit
Here are some of the benefits I’ve experienced after upgrading my Honda 400Ex with a big bore kit:
– Increased horsepower and torque
– Improved throttle response
– Better acceleration
– Ability to handle tougher terrains
– Enhanced overall performance
– Longer engine life due to increased cooling capacity
Recommended Big Bore Kits for Honda 400Ex
After researching various options, I highly recommend these two big bore kits for the Honda 400Ex:
1. Athena Big Bore Kit: This kit increases the displacement of the engine from 397cc to 440cc, resulting in improved low-end torque and top-end power.
2. Cylinder Works Big Bore Kit: With this kit, your engine’s displacement will increase from 397cc to 434cc, providing excellent low-end torque while maintaining reliability.
Both of these kits come with all necessary components for installation and have received positive reviews from fellow riders.
Conclusion
Investing in a big bore kit for my Honda 400Ex was one of the best decisions I’ve made as an ATV rider. The increased power and improved performance have taken my riding experience to another level. Just make sure to do thorough research and consider all factors before purchasing one for yourself. With proper installation and maintenance, your upgraded ATV will continue delivering peak performance for years to come.
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