Unlocking Power: My Journey with a Big Bore Kit for My 50cc Scooter
As a passionate scooter enthusiast, I’ve always been on the lookout for ways to enhance my ride, and one of the most exciting upgrades I’ve discovered is the Big Bore Kit for a 50cc scooter. This modification promises not just a boost in power but also an exhilarating transformation of the riding experience. I remember the first time I felt the difference after installing a big bore kit—it was like unleashing a whole new animal beneath me. The roar of the engine and the surge of speed were intoxicating! In this article, I’ll delve into the world of big bore kits, exploring how they can elevate a humble 50cc scooter into a performance powerhouse, and why they’ve become a must-have for riders looking to maximize their fun on two wheels. Whether you’re a seasoned rider or just starting out, join me as we explore the ins and outs of this thrilling upgrade that can redefine your scooter adventures.
I Personally Tried Out The Big Bore Kit For My 50Cc Scooter And Here Are My Honest Recommendations
Glixal GY6 100cc 50mm Complete Big Bore Cylinder Rebuild Kit with Performance Big Valve Cylinder Head Assy for 139QMB 139QMA 147QMD Engine Scooter Moped ATV Go-Kart (69mm-18.5/20.5mm Larger Valves)
GY6 Cylinder Rebuild Kits Kymlaa 100cc Big Bore Kit for 69mm Valve 49CC 50CC 139QMB Moped Scooter Engine 50mm Bore Upgrade Set with 6pin Racing CDI Ignition Coil Performance Spark Plug Clutch Spring
Glixal ATMT1-008 Performance Big Bore Cylinder Kit GY6 80cc 47mm for 139QMB ATV Scooter Moped Go Kart
Glixal ATMT1-011 139QMB 139QMA Scooter Big Bore Cylinder Kit Rebuild Kit GY6 100cc 50mm Moped ATV Go-Kart
1. Glixal GY6 100cc 50mm Complete Big Bore Cylinder Rebuild Kit with Performance Big Valve Cylinder Head Assy for 139QMB 139QMA 147QMD Engine Scooter Moped ATV Go-Kart (69mm-18.5/20.5mm Larger Valves)

I recently came across the Glixal GY6 100cc 50mm Complete Big Bore Cylinder Rebuild Kit, and I must say, it’s an impressive upgrade for anyone looking to enhance the performance of their GY6 scooter, moped, ATV, or go-kart. As someone who has explored various options in the market, I can confidently say that this product stands out due to its thoughtful design and significant performance enhancements. This kit is particularly aimed at users who want to squeeze out more power from their engines, making it ideal for both casual riders and those who enjoy pushing their vehicles to the limit.
The standout feature of this rebuild kit is the inclusion of large valve heads, which are specifically designed to deliver more power to your GY6 139QMB, 139QMA, or 147QMD engine. With the cylinder head assembly featuring 18.5mm and 20.5mm valves—up from the stock size of 16mm and 18.5mm—you can expect a noticeable boost in performance. This upgrade is not just about numbers; it translates into real-world improvements such as faster acceleration, better throttle response, and an overall more exhilarating riding experience. If you’re someone who enjoys the thrill of riding or needs a reliable engine for off-road adventures, this kit could be a game changer.
Moreover, the compatibility of this kit with 69mm long valve style heads is a significant advantage. For those whose original heads have 64mm valves, the kit comes with rocker arms that are essential for seamless installation. This attention to compatibility ensures that the kit can be used with a wide range of scooters and ATVs, making it a versatile choice for many users. Having faced compatibility issues with other products in the past, I appreciate that Glixal has made this process straightforward and user-friendly.
The piston rings included in this kit are also noteworthy. Featuring a DLC (Diamond-Like Carbon) wear-resistant coating, these rings reduce friction and protect the cylinder sleeve, promoting longevity and reliability in engine performance. Anyone who has dealt with engine wear knows how vital it is to have durable components. This feature not only enhances performance but also reduces maintenance costs in the long run, making it a wise investment for any engine enthusiast.
Lastly, I would like to highlight the importance of installation accuracy. The kit comes with clear instructions, including critical notes like the orientation of the piston marking face and the placement of the small hole. This attention to detail is crucial for ensuring optimal performance post-installation. As a user, knowing that I have a product that is easy to install and understand gives me confidence in my purchase.
if you’re in the market for an engine upgrade that delivers both power and reliability, the Glixal GY6 100cc 50mm Complete Big Bore Cylinder Rebuild Kit is an excellent choice. With its large valve heads, durable piston rings, and thoughtful design, it promises to enhance your riding experience significantly. I can’t stress enough how beneficial this kit could be for anyone looking to take their scooter or ATV performance to the next level. Don’t miss out on the opportunity to revitalize your engine and enjoy a more powerful ride!
Feature Description Large Valve Heads Increased power output with 18.5mm and 20.5mm valves. Compatibility Fits 69mm long valve style heads; includes rocker arms for 64mm valves. Piston Rings DLC wear-resistant coating reduces friction and enhances durability. Installation Clear instructions provided; attention to detail for optimal performance.
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2. GY6 Cylinder Rebuild Kits Kymlaa 100cc Big Bore Kit for 69mm Valve 49CC 50CC 139QMB Moped Scooter Engine 50mm Bore Upgrade Set with 6pin Racing CDI Ignition Coil Performance Spark Plug Clutch Spring

As a scooter enthusiast, I’m always on the lookout for ways to enhance my riding experience, and I recently stumbled upon the GY6 Cylinder Rebuild Kits Kymlaa 100cc Big Bore Kit. This product appears to be a game-changer for anyone looking to upgrade their 49CC or 50CC scooter engines. What really excites me about this kit is its potential to transform a standard scooter into a more powerful and faster machine. With the ability to upgrade from 50cc to 100cc, I can genuinely see how this kit could significantly improve performance.
The features of this big cylinder kit are impressive and cater to a wide range of users. For starters, the upgrade to 100cc without the need for an EGR system means that I can expect higher RPMs and increased power, which translates to a faster maximum speed. The 69mm valve length version is designed for performance enthusiasts like myself who are not content with mediocrity. The simplicity of installation is another highlight; it suggests that even those of us with limited mechanical skills can take on this project with relative ease.
What stands out to me is the comprehensive nature of the kit. It includes everything from the cylinder body and head kits to the camshaft and oil pump, along with all necessary gaskets and springs. This all-in-one package is not only convenient but also ensures that I have all the components needed for a successful upgrade. Additionally, the inclusion of a racing CDI and ignition coil, as well as a high-performance spark plug, indicates that this kit is engineered for serious performance. The racing 3-electrode spark plug is a nice touch, as it promises better combustion and efficiency.
For those who might be hesitant about upgrading their scooters, I can honestly say that this kit seems to offer a solid return on investment. The ability to enhance my scooter’s capabilities and enjoy a more thrilling ride is a compelling reason to consider this upgrade. Plus, the fact that the kit is compatible with most 50cc scooters adds to its appeal, making it accessible to a larger audience.
if you’re like me and crave more power and speed from your scooter, the GY6 Cylinder Rebuild Kits Kymlaa 100cc Big Bore Kit might just be the perfect solution. It’s an investment that promises not only enhanced performance but also a more enjoyable riding experience. I highly recommend considering this upgrade, as it could very well take your scooter to the next level.
Feature Description Upgrade Capability Transforms 50cc, 60cc, and 80cc engines to 100cc for increased power. Performance Enhancements Higher RPMs, more power, and faster maximum speed. Simple Installation Easy to install, suitable for users with limited mechanical skills. Comprehensive Kit Includes cylinder body, head kits, camshaft, oil pump, gaskets, springs, and more. Racing Components Includes 6-pin racing CDI, ignition coil, and racing 3-electrode spark plug. Compatibility Compatible with most 50cc scooters, making it accessible for many users.
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3. Glixal ATMT1-008 Performance Big Bore Cylinder Kit GY6 80cc 47mm for 139QMB ATV Scooter Moped Go Kart

As an avid enthusiast of scooters, mopeds, and all things automotive, I recently came across the Glixal ATMT1-008 Performance Big Bore Cylinder Kit. This product caught my attention not only due to its impressive specifications but also because of the potential it holds for enhancing the performance of various vehicles, particularly those equipped with GY6 engines. If you’re someone who enjoys customizing your ride or simply wants to improve the performance of your ATV, scooter, or go-kart, then this kit might just be what you need.
The first standout feature of the Glixal ATMT1-008 is its inner diameter of 47mm. This larger bore size allows for increased airflow and fuel intake, which directly translates into enhanced performance. For riders looking to push their vehicles beyond the standard limits, this means more power and acceleration. Whether you are commuting or hitting the trails, this upgrade could provide the extra oomph needed to tackle inclines or reach higher speeds.
Another noteworthy aspect is the high-quality durable piston rings included in the kit. These piston rings are essential for maintaining optimal engine performance, as they provide a seal between the piston and the cylinder wall, preventing oil leakage and maintaining compression. The durability of these piston rings ensures that they can withstand the rigors of performance riding, which is crucial for anyone who frequently uses their vehicle in demanding conditions.
What I particularly appreciate about this kit is its comprehensive nature. It comes with everything you need for a complete overhaul, including the cylinder, piston, piston ring, piston pin, piston pin clip, valve oil seal, gaskets, tensioner gasket, exhaust gasket, intake & exhaust studs, and exhaust nut. This all-in-one package eliminates the hassle of sourcing individual parts, making the installation process significantly easier for me and other DIY enthusiasts.
This kit is designed as a high-performance upgrade for a range of engine sizes GY6 49cc, 50cc, 60cc, and 80cc engines. This versatility means that whether I own a moped, scooter, or go-kart, I can benefit from the performance enhancements it offers. This adaptability makes the Glixal ATMT1-008 a smart investment for anyone in the market for performance upgrades.
if you’re looking to elevate your riding experience, the Glixal ATMT1-008 Performance Big Bore Cylinder Kit could be the perfect addition to your vehicle. The combination of increased diameter, high-quality components, and a complete rebuild kit makes it an attractive option for both novices and seasoned mechanics alike. Don’t miss out on the chance to transform your ride—consider adding this kit to your shopping list today!
Feature Description Inner Diameter of Cylinder 47mm Outer Diameter of Piston Pin 13mm Piston Rings High Quality Durable Included Components Cylinder, Piston, Piston Ring, Piston Pin, Piston Pin Clip, Valve Oil Seal, Gaskets, Tensioner Gasket, Exhaust Gasket, Intake & Exhaust Studs, Exhaust Nut Performance Upgrade 47mm Cylinder Rebuild Kit for GY6 49cc, 50cc, 60cc, 80cc engines
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4. Glixal ATMT1-011 139QMB 139QMA Scooter Big Bore Cylinder Kit Rebuild Kit GY6 100cc 50mm Moped ATV Go-Kart

As someone who values performance and reliability in my vehicles, I’m genuinely excited about the Glixal ATMT1-011 139QMB 139QMA Scooter Big Bore Cylinder Kit Rebuild Kit. If you’re a scooter enthusiast or someone who relies on a GY6 engine for your moped, ATV, or go-kart, this kit could be a game changer for you. It’s specifically designed for the GY6 139QMB 4-Stroke Engine, which means you can trust that every component is tailored to fit perfectly and enhance your vehicle’s capabilities.
The standout feature of this rebuild kit is its impressive 50mm inner diameter cylinder, which is a significant upgrade for anyone looking to boost their engine’s performance. With this kit, you can expect improved power output and acceleration, which is essential for navigating both urban and off-road environments. The larger cylinder allows for greater airflow and fuel intake, resulting in a more efficient combustion process. This means you’ll experience a noticeable difference in how your scooter or ATV handles, making your rides more enjoyable.
Moreover, the comprehensive nature of this rebuild kit is another aspect that impresses me. It includes everything you need for a complete overhaul the cylinder, piston, piston ring, piston pin, piston pin clip, valve oil seal, gaskets, tensioner gasket, exhaust gasket, intake and exhaust studs, and even the exhaust nut. This means I won’t have to make multiple trips to the store or search for additional parts, saving me both time and hassle. The all-in-one package is especially appealing for those who might not be experienced mechanics, as it simplifies the installation process.
Additionally, the Glixal ATMT1-011 kit is suitable for various GY6 engine displacements, including 49cc, 50cc, 60cc, 80cc, and 100cc. This versatility allows users like me to upgrade multiple vehicles without worrying about compatibility issues. Whether I’m looking to enhance my moped’s performance or give my go-kart a much-needed boost, this kit has me covered.
In terms of quality, Glixal has a reputation for producing reliable and durable components. Knowing that I am investing in a product backed by positive reviews and a solid track record gives me confidence in my purchase. The materials used in this rebuild kit are designed to withstand the rigors of everyday use, ensuring that I get the most out of my investment. I appreciate that Glixal prioritizes high performance without sacrificing longevity.
So, if you’re looking to breathe new life into your GY6 engine, I highly recommend considering the Glixal ATMT1-011 139QMB 139QMA Scooter Big Bore Cylinder Kit Rebuild Kit. The combination of performance enhancement, comprehensive kit contents, and reliable quality makes this an exceptional choice for anyone wanting to upgrade their ride. Don’t miss out on the opportunity to elevate your scooter or ATV experience—this kit could be just what you need to take your adventures to the next level!
Feature Description Engine Compatibility Only for GY6 139QMB 4-Stroke Engine Inner Diameter of Cylinder 50mm Outer Diameter of Piston Pin 13mm Included Components Cylinder, Piston, Piston Ring, Piston Pin, Piston Pin Clip, Valve Oil Seal, Gaskets, Tensioner Gasket, Exhaust Gasket, Intake & Exhaust Studs, Exhaust Nut Performance Upgrade High performance upgrade for GY6 49cc, 50cc, 60cc, 80cc, 100cc engines
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Why a Big Bore Kit for My 50cc Scooter Made a Difference
When I first bought my 50cc scooter, I loved the convenience it offered for short trips around town. However, I quickly found that the stock engine lacked the power I desired, especially when tackling hills or trying to keep up with traffic. That’s when I decided to invest in a big bore kit, and I can confidently say it was one of the best decisions I made for my scooter.
Installing a big bore kit increased my engine’s displacement, which translated into more power and torque. I felt a noticeable difference in acceleration, and I could finally zip away from stoplights without feeling like I was holding up traffic. The enhanced performance made my rides more enjoyable, and I found myself taking longer routes just to experience the thrill of my scooter’s newfound capabilities.
Additionally, the big bore kit improved my scooter’s overall efficiency. With the increased power, I didn’t have to work the engine as hard, which actually led to better fuel economy in some situations. I found that I could travel longer distances without constantly refueling, making my scooter even more practical for my daily needs. Overall, the big bore kit transformed my riding experience, adding excitement and efficiency to my everyday journeys
Buying Guide for Big Bore Kit for 50cc Scooter
When I decided to upgrade my 50cc scooter, I discovered that a big bore kit could enhance performance significantly. A big bore kit essentially increases the engine displacement, allowing for improved power and acceleration. However, choosing the right kit can be challenging. Here’s what I learned through my experience.
Understanding Big Bore Kits
A big bore kit typically includes a larger cylinder, piston, and sometimes additional components like gaskets and performance exhausts. I found that these kits can boost my scooter’s horsepower and torque, making my rides much more enjoyable. However, it’s essential to know that simply adding a big bore kit may require tuning or other modifications to ensure optimal performance.
Compatibility with My Scooter
Before purchasing, I made sure to check the compatibility of the big bore kit with my specific scooter model. Not all kits fit every scooter, so I researched thoroughly to find the right one. I also learned that some kits might require additional modifications to install properly, so I kept that in mind.
Quality of Materials
I realized that the quality of materials used in the big bore kit was crucial. Higher-quality materials tend to provide better durability and performance. I paid attention to reviews and feedback from other users to gauge the reliability of the kits I considered.
Installation Process
Installing a big bore kit can be a complex process. I found that some kits are easier to install than others, and I had to decide whether I wanted to tackle the installation myself or seek professional help. If I chose to do it myself, I ensured that I had all the necessary tools and followed the instructions carefully.
Performance Gains
In my research, I learned about the potential performance gains from installing a big bore kit. I found that most users experienced improved acceleration and top speed. However, I also discovered that the actual gains can vary depending on the kit and the existing condition of my scooter.
Legal Considerations
One important aspect I couldn’t overlook was the legal implications of modifying my scooter. In some areas, modifying the engine displacement can affect registration and insurance. I checked local regulations to ensure that my upgrades would comply with the law.
Budgeting for the Upgrade
I quickly realized that my budget would play a significant role in my decision. Big bore kits vary in price, and I needed to consider not only the cost of the kit but also any additional expenses for installation and necessary modifications. I set a budget and focused on finding the best value for my investment.
Choosing a big bore kit for my 50cc scooter was an exciting journey. By considering compatibility, quality, installation, performance, legalities, and budget, I felt more confident in my decision. I recommend taking the time to research and understand what I needed before making a purchase. Happy riding!
Author Profile

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Hi, I’m Joseph Roberts though you might know me better through my work at The NYDAG Group. For over twenty years, I’ve immersed myself in the insurance and financial services industry, helping individuals, families, and businesses navigate everything from tax planning to complex risk strategies. I founded The NYDAG Group in Vernon, New York, as a full-service accounting and insurance firm designed to make financial clarity and reliable coverage accessible to all.
That’s why, starting in 2025, I began writing a new kind of blog, one focused on personal product analysis and first-hand usage reviews. After spending years helping clients make informed financial decisions, I realized how much the same principles apply to everyday purchases. My blog now bridges those worlds: offering clear, experience-based insight into products that people use every day whether it's insurance tools, financial software, or lifestyle essentials.
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