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50mm Big Bore Cylinder Head Kit Assy with 69mm Valves for GY6 50cc-100cc 139QMA 139QMB Engine Scooter Moped ATV Go Kart Quad
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50mm Big Bore Cylinder Head Kit Assy with 69mm Valves for GY6 50cc-100cc 139QMA 139QMB Engine Scooter Moped ATV Go Kart Quad
Experience powerful performance and durability with our 50mm Big Bore Cylinder Head Kit, designed for GY6 50cc-100cc engines.
50mm Big Bore Cylinder Head Kit Assy with 69mm Valves for GY6 50cc-100cc 139QMA 139QMB Engine Scooter Moped ATV Go Kart Quad
Item #: 199419870

50mm Big Bore Cylinder Head Kit Assy with 69mm Valves for GY6 50cc-100cc 139QMA 139QMB Engine Scooter Moped ATV Go Kart Quad

Item #: 199419870

USD 74

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*All items will import from US

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Order now and get it around Wednesday, October 07
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Experience powerful performance and durability with our 50mm Big Bore Cylinder Head Kit, designed for GY6 50cc-100cc engines.
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What Stands Out

Performance Upgrade
Enhances engine performance with a larger 50mm cylinder head and 69mm valves, delivering increased power and efficiency for scooters, mopeds, and ATVs.
Versatile Compatibility
Designed to fit various 139QMA and 139QMB engines, making it an ideal choice for a wide range of scooters, mopeds, and go-karts.
Quality Construction
Manufactured with high-quality materials for durability and longevity, ensuring reliable performance and peace of mind for buyers.

Product Details

50mm Big Bore Cylinder Head Kit Assy with 69mm Valves for GY6 50cc-100cc 139QMA 139QMB Engine Scooter Moped ATV Go Kart Quad

Who Should Buy?

Suitable For
  • Performance Enthusiasts

    Ideal for users seeking to enhance their scooter's power and speed with increased engine performance.

  • DIY Mechanics

    Perfect for those who enjoy hands-on projects and have the skills to install engine upgrades themselves.

  • Race Competitors

    Suited for individuals involved in racing, where greater engine performance can provide a competitive edge.

Not Suitable For
  • Casual Riders

    Not suitable for users who primarily use scooters for simple commuting without performance enhancements.

Product Description

50mm Big Bore Cylinder Head Kit Assy with 69mm Valves for GY6 50cc-100cc 139QMA 139QMB Engine Scooter Moped ATV Go Kart Quad

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What is the benefit of using a 50mm Big Bore Cylinder Head Kit?

    Answer: The 50mm Big Bore Cylinder Head Kit allows for increased engine displacement, resulting in improved horsepower and torque. This upgrade enhances the performance of your GY6 engine, making it more powerful and responsive. Users typically experience better acceleration and higher top speeds, which is particularly advantageous for scooters, mopeds, and ATV applications. Additionally, this kit is designed to work seamlessly with 69mm valves, ensuring optimal airflow and combustion efficiency.
  • Question: Is this kit compatible with all GY6 engines?

    Answer: This kit is specifically designed for GY6 engines (139QMA and 139QMB models) that range from 50cc to 100cc. While it fits a wide variety of scooters, mopeds, and ATVs, it is crucial to verify your engine model to ensure compatibility. Using this kit on incompatible engines may lead to mechanical issues. Consult your engine specifications before making a purchase, and consider professional installation for the best results.
  • Question: Do I need any additional parts when installing this cylinder head kit?

    Answer: When installing the 50mm Big Bore Cylinder Head Kit, some additional components may be necessary, such as gaskets, seals, and potentially modified carburetors or exhausts to handle the increased airflow. Depending on your specific engine setup, it’s advisable to assess what parts are essential for a successful installation. Thorough preparation ensures that the upgrade performs optimally, maximizing the benefits of increased engine performance.
  • Question: What tools are required for the installation of this cylinder head kit?

    Answer: To install the 50mm Big Bore Cylinder Head Kit, you will need standard tools such as a socket and wrench set, screwdrivers, possibly a torque wrench, and a compression gauge to check engine pressure post-installation. Additionally, having a service manual for your specific engine model can guide you through the installation process, ensuring each step is executed correctly and safely. Proper tools and preparation help avoid common pitfalls during the upgrade.
  • Question: How do I know if my GY6 engine needs a big bore upgrade?

    Answer: If you find that your scooter or ATV lacks power, struggles with inclines or feels sluggish during acceleration, it may be time to consider a big bore upgrade. This kit offers improved performance characteristics, which can reinvigorate the responsiveness and efficiency of your engine. Testing the performance and considering your riding needs can help assess if this upgrade is suitable for your vehicle.
  • Question: What are the key features of the 69mm valves included in this kit?

    Answer: The 69mm valves included in the kit are designed to enhance airflow, allowing for better combustion efficiency within the engine. These larger valves facilitate a greater volume of air and fuel mixture entering the combustion chamber, improving performance and responsiveness. For riders seeking enhanced power and acceleration for off-road riding or racing, upgrading to larger valves can dramatically impact your overall engine capabilities.
  • Question: Will I need to adjust my carburetor after installation?

    Answer: Yes, after installing the 50mm Big Bore Cylinder Head Kit, adjusting your carburetor is often necessary to ensure optimal fuel delivery and air-fuel mixture balance. The increase in engine size and airflow requires a recalibration to prevent running too lean or too rich, which can affect performance and engine longevity. Consulting a professional technician for tuning suggestions can help maximize your engine's performance following the upgrade.
  • Question: Can I use this cylinder head kit on a go-kart or quad?

    Answer: Absolutely! The 50mm Big Bore Cylinder Head Kit is perfect for enhancing the performance of go-karts and quads, given that they utilize GY6 engines (models 139QMA and 139QMB). This upgrade provides the additional power and torque necessary for more challenging terrains and racing scenarios, allowing for improved speed and efficiency. Always make sure the engine specifications match to ensure a perfect fit.
  • Question: What maintenance is required after upgrading to a big bore kit?

    Answer: After upgrading to the 50mm Big Bore Cylinder Head Kit, regular maintenance is imperative to keep your engine performing at its best. This includes frequent oil changes, inspecting and cleaning the air filter, and monitoring valve lash adjustments. Paying attention to any changes in performance or unusual sounds after installation can also alert you to potential issues that may need immediate attention. Consistent upkeep will ensure the longevity and reliability of your upgraded engine.
  • Question: Where can I buy the 50mm Big Bore Cylinder Head Kit Assy?

    Answer: You can find the 50mm Big Bore Cylinder Head Kit Assy with 69mm Valves for GY6 engines on Ubuy in El Salvador. Ubuy offers a wide selection of performance parts, ensuring you get quality components to enhance your scooter or ATV's performance. Their user-friendly platform and customer service can assist you in securing the right parts for your needs.

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Pros

  • Enhanced engine performance
  • High-quality materials
  • Easy to install
  • Improves fuel efficiency
  • Compatible with multiple models

Cons

  • May require slight adjustments for perfect fit

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  • Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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USD 74

Order now and get it around Wednesday, October 07

QTY:

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Our Top Logistics Partners
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Fastest cross-border delivery

Features & Benefits

  • Compatible with GY6 50cc-100cc 139QMB and 139QMI engines.
  • Features a 50mm cylinder diameter with 69mm valves for enhanced performance.
  • Provides super heat dissipation to maintain engine stability.
  • Constructed with high-grade materials for maximum durability and corrosion resistance.
  • Designed for optimal oil saving while delivering strong power.
  • Backed by professional after-sales support for your satisfaction.

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