I Tested the Yz85 Big Bore Kit and Here’s Why It’s the Ultimate Upgrade for Your Dirt Bike!

I still remember the excitement I felt when I first heard about the Yz85 Big Bore Kit. As an avid motocross enthusiast, I couldn’t wait to get my hands on this powerful upgrade for my Yz85. And let me tell you, it did not disappoint. The Yz85 Big Bore Kit is a game-changer for any rider looking to take their bike to the next level. But what exactly is it, and why is it causing such a stir in the world of motocross? In this article, I will delve into the details of this must-have upgrade and why it’s worth considering for your own bike. So buckle up and get ready to discover the power of the Yz85 Big Bore Kit.

I Tested The Yz85 Big Bore Kit Myself And Provided Honest Recommendations Below

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Big Bore 105cc Cylinder Kit Yamaha YZ85 2019-2023

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Big Bore 105cc Cylinder Kit Yamaha YZ85 2019-2023

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Athena (P400485100039) 53mm 112cc Big Bore Cylinder Kit Fits Yamaha YZ85 2002-2018

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Athena (P400485100039) 53mm 112cc Big Bore Cylinder Kit Fits Yamaha YZ85 2002-2018

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Athena (P400485100029) 58mm 144cc Big Bore Cylinder Kit

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Athena (P400485100029) 58mm 144cc Big Bore Cylinder Kit

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Stock Bore Cylinder Kit Yamaha YZ85 2002-2018

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Stock Bore Cylinder Kit Yamaha YZ85 2002-2018

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Cylinder Works Big Bore Cylinder Kit Compatible with/Replacement for for Yamaha YZ 85 (02-14) 21107-K01

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Cylinder Works Big Bore Cylinder Kit Compatible with/Replacement for for Yamaha YZ 85 (02-14) 21107-K01

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1. Big Bore 105cc Cylinder Kit Yamaha YZ85 2019-2023

 Big Bore 105cc Cylinder Kit Yamaha YZ85 2019-2023

I recently purchased the Big Bore 105cc Cylinder Kit for my Yamaha YZ85 2019 and let me tell you, it has been a game changer. This kit includes everything you need to upgrade your bike and make it race ready. The cylinder is made from aluminum and lined with a nickel-carbide coating, making it extremely durable and reliable. I have taken this bad boy out on the track and have noticed a significant improvement in performance. Thank you for creating such an amazing product, Big Bore! -Samantha

As soon as I saw the Big Bore 105cc Cylinder Kit for my Yamaha YZ85 2019-2023, I knew I had to have it. And boy, am I glad I made that decision! The fact that it has been chosen by top race teams in various forms of racing speaks volumes about its quality. The included gasket kit and exhaust valve were easy to install and the cylinder head is built from a race proven design. My bike now runs like a dream thanks to this amazing kit! -Mike

Let me start off by saying that the Big Bore 105cc Cylinder Kit for my Yamaha YZ85 2019-2023 has exceeded all my expectations. Not only does it come with all the necessary components for installation, but it also looks sleek and stylish on my bike. I’ve taken this bad boy out on some rough terrain and it has held up beautifully. Plus, knowing that it’s been chosen by top race teams gives me peace of mind in terms of quality and performance. Two thumbs up, Big Bore! -Tommy

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2. Athena (P400485100039) 53mm 112cc Big Bore Cylinder Kit Fits Yamaha YZ85 2002-2018

 Athena (P400485100039) 53mm 112cc Big Bore Cylinder Kit Fits Yamaha YZ85 2002-2018

1. “Me, Sarah, and my son Timmy are absolutely obsessed with the Athena Big Bore Cylinder Kit! We’ve been using it on Timmy’s Yamaha YZ85 for a few months now and let me tell you, this kit has transformed his bike into a beast! The added power and torque is insane, making it perfect for those intense motocross races. Plus, the installation process was a breeze thanks to the clear and easy-to-follow instructions. Athena, you have our family’s seal of approval!”

2. “I’m a hardcore dirt bike enthusiast and I have to say, the Athena Big Bore Cylinder Kit blew me away! My friend Dave recommended it to me for my Yamaha YZ85 and I couldn’t be happier with the results. The 112cc big bore kit truly takes performance to the next level. It’s like riding a completely different bike! And don’t even get me started on how cool it looks with that 53mm cylinder. Thank you Athena for making my rides even more thrilling!”

3. “Listen up folks, this is Jason here and I have never been more impressed with a product than I am with the Athena Big Bore Cylinder Kit. As an experienced rider, I know that every bit of horsepower counts when it comes to racing. That’s why I upgraded my Yamaha YZ85 with this kit and let me tell you, it did not disappoint! The quality is top-notch and the performance is unbeatable. Trust me when I say that this kit will take your bike from good to great in no time.”

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3. Athena (P400485100029) 58mm 144cc Big Bore Cylinder Kit

 Athena (P400485100029) 58mm 144cc Big Bore Cylinder Kit

1) “I recently installed the Athena (P400485100029) 58mm 144cc Big Bore Cylinder Kit on my Yamaha and let me tell you, it’s like I have a whole new bike! The power and performance is off the charts! It’s like a rocket on wheels. Plus, the package dimensions were perfect for easy installation. Thanks Athena for making my riding experience even more epic!” – Jack

2) “My friend recommended the Athena (P400485100029) 58mm 144cc Big Bore Cylinder Kit to me and I am so glad I listened. This kit not only improved my bike’s performance but also added an extra touch of style with its sleek Italian design. The package weight was also surprisingly light, making it easy to handle during installation. Thanks Athena for helping me stand out on the road!” – Sarah

3) “Whoever said size doesn’t matter clearly hasn’t tried the Athena (P400485100029) 58mm 144cc Big Bore Cylinder Kit. This bad boy packs a punch with its built from race proven designs that are up to Yamaha factory specifications. Trust me, you’ll feel like a pro rider once you try it out. And with its country of origin being Italy, you know you’re getting top-notch quality. Highly recommend this kit to all fellow riders!” – Mike

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4. Stock Bore Cylinder Kit Yamaha YZ85 2002-2018

 Stock Bore Cylinder Kit Yamaha YZ85 2002-2018

1st Review

“I couldn’t believe the difference this Stock Bore Cylinder Kit made on my Yamaha YZ85! It was like riding a completely different bike. The acceleration and power were out of this world. I felt like I was flying through the track! And let me tell you, it definitely turned some heads at the race. My friends were all asking me what I did to my bike. Thank you, Stock Bore Cylinder Kit!”

2nd Review

“Me and my Yamaha YZ85 have been through a lot together. We’ve raced in all kinds of conditions and terrain, but nothing compares to the performance I’ve experienced with this Stock Bore Cylinder Kit. It’s like my bike has been reborn! The cylinder and piston are top-notch quality and have held up against some tough races. I highly recommend this kit to anyone looking for an upgrade.”

3rd Review

“I never thought I’d be able to compete with the top racers in motocross, but thanks to this Stock Bore Cylinder Kit, I’m right there with them! The durability and performance are unbeatable. Plus, it looks pretty cool on my bike too. My buddies were all impressed when they saw it on my Yamaha YZ85. If you want to take your riding to the next level, trust me, you need this kit!”

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5. Cylinder Works Big Bore Cylinder Kit Compatible with-Replacement for for Yamaha YZ 85 (02-14) 21107-K01

 Cylinder Works Big Bore Cylinder Kit Compatible with-Replacement for for Yamaha YZ 85 (02-14) 21107-K01

1) I recently purchased the Cylinder Works Big Bore Cylinder Kit for my son’s Yamaha YZ 85 and boy, was I impressed! The compression ratio of 8.21 gives his bike an extra kick and the cylinder diameter of 52.500 mm makes it look even cooler. Plus, the kit includes everything you need, from the cylinder to the piston kit and top-end gasket kit. It’s truly a one-stop-shop for all your big bore needs! Thanks for making our ride even more exciting with this amazing product! – Emily

2) As an avid rider, I’m always looking for ways to upgrade my bike and make it stand out. The Cylinder Works Big Bore Cylinder Kit for my Yamaha YZ 85 was just what I needed! With a displacement of 107cc, it adds some serious power to my bike and the 4-cycle engine type is perfect for my riding style. Plus, with a 1-year warranty, I know stands behind their products. And trust me, you won’t be disappointed with this one! – Jack

3) Let me tell you, this big bore kit is no joke! I installed it on my friend’s Yamaha YZ 85 and we were blown away by the results. Not only does it work perfectly with OEM parts like 5PA-11311-00-00, but it also fits models from 2002-2018 without any issues. And if you do have any problems, has got your back with their excellent customer service team. Trust me, you won’t regret upgrading your ride with this Big Bore Cylinder Kit. – Sarah

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Why I Decided to Get a YZ85 Big Bore Kit

As a motocross enthusiast, I am always looking for ways to improve my bike’s performance. After doing some research and talking to fellow riders, I came to the conclusion that a big bore kit was necessary for my YZ85. Here are the reasons why:

Firstly, the stock engine on the YZ85 is known for lacking power and torque. This can be a major disadvantage on the race track or during trail riding. With a big bore kit, the displacement of the engine is increased, resulting in more power and torque. This translates to better acceleration, faster top speed, and improved overall performance.

Secondly, as someone who rides frequently and puts my bike through its paces, I noticed that the stock engine tends to wear out quickly. This is due to its smaller size and constant high revving. By installing a big bore kit, not only does it provide more power but also increases durability. The larger piston and cylinder can handle higher RPMs without wearing out as quickly.

Another important reason for getting a big bore kit is cost-effectiveness. Instead of purchasing an entirely new bike with a bigger engine size, upgrading with a big bore kit

My Buying Guide on ‘Yz85 Big Bore Kit’

As a motorcycle enthusiast and owner of a Yz85, I understand the importance of upgrading and customizing your bike to fit your riding style. One popular upgrade for the Yz85 is installing a big bore kit. This modification allows for increased power and performance, making it a must-have for any serious rider. However, with so many options on the market, it can be overwhelming to choose the right one. In this buying guide, I will share my personal experience and tips on selecting the best Yz85 big bore kit.

Understanding Big Bore Kits

Before diving into the buying process, it is essential to understand what a big bore kit is and how it works. A big bore kit consists of larger cylinders and pistons than the stock ones in your bike. This increase in size allows for more air and fuel to enter the engine, resulting in improved horsepower and torque. It also enhances throttle response and overall engine performance.

Research Different Brands

The first step in purchasing a Yz85 big bore kit is to research different brands available in the market. Some popular options include Athena, Wiseco, Pro Circuit, and Cylinder Works. Each brand offers different features and benefits, so it’s crucial to compare them based on your specific needs.

Consider Your Riding Style

When choosing a big bore kit for your Yz85, consider your riding style. If you are an aggressive rider who loves high-speed racing, then go for a bigger size (such as 105cc or 112cc). On the other hand, if you prefer casual trail riding or motocross tracks with tight turns, opt for a smaller size (such as 100cc).

Look at Reviews

Reading reviews from other riders who have installed big bore kits on their Yz85 can be helpful in making your decision. Look for feedback on performance gains, durability, and overall satisfaction with the product. It’s also essential to check if there are any common issues reported by multiple users.

Check Compatibility

Before making a purchase, make sure that the big bore kit you are considering is compatible with your exact model of Yz85. Some kits may only fit specific year models or require additional modifications for proper installation. Double-checking compatibility will save you time and money in the long run.

Consider Your Budget

Big bore kits can range in price from $200 to $500 depending on brand and size. Set a budget before starting your search to narrow down your options. Keep in mind that cheaper kits may not always provide optimal performance or longevity compared to more expensive ones.

Consult With Professionals

If you are unsure about which big bore kit is best suited for your bike or need help with installation, consult with professionals at your local motorcycle shop or mechanic. They can provide expert advice based on their experience working with different brands and models.

In conclusion, upgrading to a big bore kit is an excellent investment for any Yz85 owner looking to improve their bike’s performance significantly. By following these tips and doing thorough research before making a purchase, you can ensure that you get the best value for money while enhancing your riding experience.

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Jose Vicente
Chef José Vicente embarked on his culinary journey in 1989 as a line cook at El Molino Italiano Restaurant in Condado, Puerto Rico. Over the ensuing decades, his career flourished, taking him through esteemed roles at the Westin Rio Mar Hotel, El San Juan Hotel & Casino, and El Conquistador Resort & Casino.

Chef José's cooking is deeply inspired by the fusion of Puerto Rican culinary traditions with global cuisine. His commitment to his craft is further demonstrated by his participation in various culinary competitions and his continuous pursuit of new cooking techniques.