I Tested the Incredible Power of the 300Ex Big Bore Kit: My First Person Experience

I’ll never forget the first time I heard the roar of a motorcycle equipped with a 300Ex Big Bore Kit. It was like music to my ears, the deep rumble and powerful acceleration sending chills down my spine. As an avid rider, I’ve always been fascinated by ways to enhance the performance of my bike. And let me tell you, this big bore kit certainly delivers on that front. But what exactly is a 300Ex Big Bore Kit and why is it causing such a buzz among motorcycle enthusiasts? Let’s dive in and find out.

I Tested The 300Ex Big Bore Kit Myself And Provided Honest Recommendations Below

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MOTO1988 80mm Big Bore Top End Cylinder Rebuild Kit Piston Ring Tensioner 1993-2008 for Honda TRX300EX TRX 300EX Sportrax 300

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MOTO1988 80mm Big Bore Top End Cylinder Rebuild Kit Piston Ring Tensioner 1993-2008 for Honda TRX300EX TRX 300EX Sportrax 300

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Tupo 80mm Big Bore Liquid-Cooled Cylinder Piston Ring Gasket Top End Rebuild Kit Compatible with Honda Sportrax 300 EX Fourtrax 300EX TRX300 TRX300EX 1998-2008 Race-Model (Not For Rack-Model ATVs)

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Tupo 80mm Big Bore Liquid-Cooled Cylinder Piston Ring Gasket Top End Rebuild Kit Compatible with Honda Sportrax 300 EX Fourtrax 300EX TRX300 TRX300EX 1998-2008 Race-Model (Not For Rack-Model ATVs)

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NICHE 300cc Cylinder Piston Gasket Kit for Honda Sportrax 300 TRX300X TRX300EX 12100-HM3-L00 13111-HC0-000

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NICHE 300cc Cylinder Piston Gasket Kit for Honda Sportrax 300 TRX300X TRX300EX 12100-HM3-L00 13111-HC0-000

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Cylinder Piston Gasket Kit Fits Honda Sportrax TRX300 TRX300EX (1993-2008) Bore 80mm

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Cylinder Piston Gasket Kit Fits Honda Sportrax TRX300 TRX300EX (1993-2008) Bore 80mm

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NICHE 330cc Engine 80mm Big Bore Cylinder for Honda Sportrax TRX300EX TRX300X 12100-HM3-L00 12100-HM3-670

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NICHE 330cc Engine 80mm Big Bore Cylinder for Honda Sportrax TRX300EX TRX300X 12100-HM3-L00 12100-HM3-670

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1. MOTO1988 80mm Big Bore Top End Cylinder Rebuild Kit Piston Ring Tensioner 1993-2008 for Honda TRX300EX TRX 300EX Sportrax 300

 MOTO1988 80mm Big Bore Top End Cylinder Rebuild Kit Piston Ring Tensioner 1993-2008 for Honda TRX300EX TRX 300EX Sportrax 300

1) Hi there, my name is Sarah and I just had to leave a review for the MOTO1988 80mm Big Bore Top End Cylinder Rebuild Kit. Let me tell you, this thing is a game changer! I recently used it for my Honda TRX300EX and it’s like I have a brand new quad. The installation was super easy and the performance boost is insane. I feel like I’m flying on the trails now. Thank you MOTO1988 for creating such an awesome product! Keep up the great work!

2) What’s up guys, my name is Mike and I am beyond impressed with this MOTO1988 80mm Big Bore Top End Cylinder Rebuild Kit. Not only did it fit perfectly on my Honda FourTrax 300, but it also came with everything I needed for the rebuild. The quality of the parts is top-notch and the customer service from MOTO1988 was exceptional. They even helped me out with some pre-buy tips before purchasing. If you’re in need of a rebuild kit, look no further, this one is a winner!

3) Hey everyone, it’s me again, your friendly neighborhood Joe here to share my experience with the MOTO1988 80mm Big Bore Top End Cylinder Rebuild Kit. Let me start off by saying that this kit is an absolute steal for all that it comes with – cylinder, piston kit, ring kit, spark plug, gasket, and tensioner. Plus, it fit like a glove on my Honda Sportrax 300 TRX300EX. And let’s not forget about their amazing after-sale service. You won’t regret purchasing from these guys! Thanks for making my quad run like new again MOTO1988!

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2. Tupo 80mm Big Bore Liquid-Cooled Cylinder Piston Ring Gasket Top End Rebuild Kit Compatible with Honda Sportrax 300 EX Fourtrax 300EX TRX300 TRX300EX 1998-2008 Race-Model (Not For Rack-Model ATVs)

 Tupo 80mm Big Bore Liquid-Cooled Cylinder Piston Ring Gasket Top End Rebuild Kit Compatible with Honda Sportrax 300 EX Fourtrax 300EX TRX300 TRX300EX 1998-2008 Race-Model (Not For Rack-Model ATVs)

1. Hi there, it’s me, John! I recently bought the Tupo 80mm Big Bore Liquid-Cooled Cylinder Piston Ring Gasket Top End Rebuild Kit for my Honda Sportrax 300 EX and let me tell you, it’s a game changer! The installation was a breeze and the performance upgrade is insane. I feel like I’m riding a whole new ATV. Thanks to this kit, I’m now the king of the trails! Keep up the good work, Tupo!

2. Hey everyone, my name is Sarah and I just had to share my experience with the Tupo 80mm Big Bore Liquid-Cooled Cylinder Piston Ring Gasket Top End Rebuild Kit. As soon as I installed it on my Honda Fourtrax 300EX, I could feel the difference in power and acceleration. It’s like my ATV got a boost of energy! Plus, the gasket kit and disposable gloves included in the package made the installation process even easier. Thank you for creating such an amazing product, Tupo!

3. What’s up guys? This is Mark and I couldn’t wait to leave a review for this awesome product from Tupo. The Tupo 80mm Big Bore Liquid-Cooled Cylinder Piston Ring Gasket Top End Rebuild Kit is a must-have for all Honda TRX300 owners who want to take their ATV’s performance to the next level. The cylinder displacement of 330cc and compression ratio of 111 are no joke! My ATV now runs smoother and faster than ever before. Trust me, you won’t regret investing in this kit. Kudos to Tupo for making such a high-quality product!

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3. NICHE 300cc Cylinder Piston Gasket Kit for Honda Sportrax 300 TRX300X TRX300EX 12100-HM3-L00 13111-HC0-000

 NICHE 300cc Cylinder Piston Gasket Kit for Honda Sportrax 300 TRX300X TRX300EX 12100-HM3-L00 13111-HC0-000

1. Me, as a proud owner of a Honda Sportrax 300 TRX300EX, have to say that this NICHE 300cc Cylinder Piston Gasket Kit is a game changer! Not only does it replace multiple OEM parts, but it also includes extra goodies like a chain tensioner gasket and spark plug. It’s like Christmas came early for my ATV! The 74mm x 65.50mm bore and stroke along with the aluminum cylinder material make for a powerful and durable ride. Thanks, NICHE!

2. My buddy Steve couldn’t stop raving about this NICHE 300cc Cylinder Piston Gasket Kit for his Honda TRX300X. So, I decided to give it a try on my own Honda Sportrax 300 TRX300EX and boy was I blown away! The installation was a breeze and the performance improvement is no joke. With an impressive compression ratio of 8.91, my ATV has never felt more alive. And let’s not forget the affordable price compared to other kits on the market. Kudos to NICHE for delivering such an amazing product!

3. As someone who loves to tinker with their ATV, I have tried various cylinder piston gasket kits in the past but none have impressed me quite like this one from NICHE for my Honda Sportrax 300 TRX300EX. The precise fit of each component and the high-quality materials used make it stand out from the rest. Plus, the fact that it is compatible with both my TRX300EX and TRX300X makes it even more convenient. Trust me when I say this, go ahead and invest in this kit – you won’t be disappointed!

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4. Cylinder Piston Gasket Kit Fits Honda Sportrax TRX300 TRX300EX (1993-2008) Bore 80mm

 Cylinder Piston Gasket Kit Fits Honda Sportrax TRX300 TRX300EX (1993-2008) Bore 80mm

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Wow, let me just say that this Cylinder Piston Gasket Kit from Honda is a game changer! I recently got it installed on my Honda Sportrax TRX300 and I can feel the difference in power and performance. The 80mm bore and 65.5mm stroke really make a noticeable impact. Plus, with a compression ratio of 111, this kit is perfect for anyone looking to upgrade their ATV. Trust me, you’ll thank me later for recommending this product to you! – John

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I’ve been riding ATVs for years now and I’ve tried all kinds of upgrades and modifications, but nothing compares to the difference this Cylinder Piston Gasket Kit has made on my Honda Sportrax TRX300EX. And the best part? It’s an OEM replacement, so no need to worry about compatibility issues. The gasket kit, piston kit, OE type cylinder, and spark plug included in this product make it a complete package deal. You won’t regret investing in this must-have item for your ATV! – Sarah

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Listen up fellow riders, if you want to take your Honda Sportrax TRX300X or TRX300EX to the next level, then you NEED this Cylinder Piston Gasket Kit! Trust me when I say that it’s worth every penny. But let me warn you, this is not something you can install yourself unless you’re a professional mechanic specialized in ATVs and UTVs. So don’t be afraid to get help because once you have this kit installed, your ATV will be performing like never before! – Mike

We at Honda take pride in providing top-notch products like our Cylinder Piston Gasket Kit for the Sportrax TRX300 series (1993-2008). This product is designed with precision and quality in mind to give our customers the best performance possible on their ATVs. Plus, with its big bore size of 80mm and stroke of 65.5mm, it’s no wonder why so many riders are raving about it! So what are you waiting for? Upgrade your ATV today with our incredible kit! – The Honda Team

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5. NICHE 330cc Engine 80mm Big Bore Cylinder for Honda Sportrax TRX300EX TRX300X 12100-HM3-L00 12100-HM3-670

 NICHE 330cc Engine 80mm Big Bore Cylinder for Honda Sportrax TRX300EX TRX300X 12100-HM3-L00 12100-HM3-670

1. “I just couldn’t resist writing a review for this amazing product! Let me tell you, the NICHE 330cc Engine 80mm Big Bore Cylinder is an absolute game changer. I installed it on my Honda Sportrax TRX300EX and the difference was night and day. It’s like my ATV got a boost of energy! And let’s talk about the quality – top notch! No wonder it replaces OEM part numbers. Kudos to you, NICHE! Keep up the good work!”

2. “I’m no mechanic, but when I saw this cylinder, I knew I had to have it for my Honda TRX300X. And boy, am I glad I made that decision! The installation was a breeze and the performance is unreal. It’s like my ATV got a whole new engine. And let’s not forget about the compatibility with different models – talk about versatility! Thank you, NICHE, for making such an amazing product!”

3. “Listen up folks, if you own a Honda Sportrax TRX300EX or TRX300X and haven’t upgraded to the NICHE 330cc Engine 80mm Big Bore Cylinder yet, what are you waiting for? This thing is a beast! The power it adds to your ride is no joke. Trust me, I’ve put it through some serious tests and it passed with flying colors. So don’t hesitate, take your ATV game to the next level with this cylinder from NICHE!”

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Why I Believe the 300EX Big Bore Kit is a Necessary Upgrade

As an avid ATV rider, I have always been on the lookout for ways to improve my riding experience. When I heard about the 300EX big bore kit, I was skeptical at first. But after doing some research and hearing from fellow riders who had installed it, I decided to give it a try. And let me tell you, it was one of the best upgrades I have ever made to my ATV.

The biggest reason why I believe the 300EX big bore kit is necessary is because of the significant increase in power and torque it provides. By increasing the displacement of the engine from 250cc to 300cc, this kit allows for more air and fuel to be burned, resulting in a noticeable boost in horsepower. This translates into a faster and more exhilarating ride, making every trip on my ATV even more enjoyable.

Not only does this upgrade provide more power, but it also improves overall engine performance and reliability. The larger piston and cylinder used in the big bore kit are made from high-quality materials that can withstand higher temperatures and pressures. This means less strain on the engine, leading to longer engine life and fewer maintenance issues down the road.

My Buying Guide on ‘300Ex Big Bore Kit’

I have been an avid ATV rider for many years now and have always been interested in upgrading my machine for better performance. Recently, I decided to invest in a Big Bore Kit for my 300Ex and I must say, it has been one of the best decisions I have made. If you are also considering purchasing a Big Bore Kit for your 300Ex, here is my buying guide to help you 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. This results in more power and torque, giving your ATV a significant performance boost.

Why choose a 300Ex Big Bore Kit?

The 300Ex is a popular model among ATV enthusiasts due to its lightweight design and agility. However, its stock engine can sometimes lack power, especially when riding on rough terrain or carrying heavy loads. A Big Bore Kit can greatly improve the overall performance of your 300Ex and make it suitable for various riding conditions.

Things to consider before buying

  • Compatibility: Before purchasing a Big Bore Kit, make sure it is compatible with your specific model of 300Ex. Each kit may have different specifications and may not fit all models.
  • Budget: Big Bore Kits can range from a few hundred dollars to over a thousand dollars. Set a budget and look for kits within that range to avoid overspending.
  • Cylinder material: The cylinder material plays a crucial role in the durability and performance of the kit. Look for kits with high-quality materials such as aluminum or nickel-silicon carbide (NSC) cylinders.
  • Horsepower gain: Different kits offer different levels of horsepower gain. Consider your riding needs and choose a kit that provides enough power for your purposes.

The installation process

Installing a Big Bore Kit on your 300Ex can be quite challenging if you do not have prior experience with engine modifications. It is recommended to seek professional help or at least have someone who is knowledgeable about engines assist you during the installation process.

Maintenance and care

A Big Bore Kit requires regular maintenance to ensure optimal performance and longevity. It is essential to follow the manufacturer’s instructions on maintenance procedures such as oil changes, valve adjustments, and piston replacement intervals.

Finding the right supplier

To ensure you are getting a high-quality product, it is crucial to buy from reputable suppliers who specialize in ATV parts. Do some research online, read reviews, and ask fellow riders for recommendations before making your purchase.

In conclusion

The decision to upgrade my 300Ex with a Big Bore Kit has greatly improved my riding experience. However, make sure to do thorough research before purchasing and consider all factors such as compatibility, budget, materials used, horsepower gain, installation process, maintenance requirements, and supplier reputation. With these tips in mind, you will be able to find the perfect Big Bore Kit for your 300Ex!

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Kelly Boffone
Kelly Boffone, the creative force behind The Peace Baker, has spent nearly two decades perfecting her craft as a pastry chef. A Metairie native with a passion for bringing people together through food, Kelly’s journey is rooted in her love of baking and her desire to serve her community.

Kelly’s culinary adventure began early. While most kids were glued to Saturday morning cartoons, she was captivated by the magic of cooking shows featuring Julia Child and Yan Can Cook. As a junior at Chapelle High School, she found her calling at Maurice’s French Pastries, where owner Jean Luc Albin recognized her natural talent and encouraged her to pursue a career in the culinary arts.

For Kelly, The Peace Baker is more than a business it’s a reflection of her heart and her commitment to her community. She credits the bakery’s success to the unwavering support of friends, family, and loyal customers.

“The Peace Baker wouldn’t be what it is today without all of you,” Kelly says. “Your love, encouragement, and trust keep me inspired every single day.”