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
Numéro d'article: 199419870

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

Numéro d'article: 199419870

XOF 50049

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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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Ce qui se démarque

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.

Détails du produit

Shop 50mm Big Bore Cylinder Head Kit Assy with 69mm Valves for GY6 50cc-100cc 139QMA 139QMB Engine Scooter Moped ATV Go Kart Quad online at a best price in Mali. B0FNKPTQP2

À qui est-ce destiné ?

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.

DESCRIPTION DU PRODUIT

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

Vous avez une question ? Chattez avec nous

Questions et réponses des clients

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

    répondre: 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?

    répondre: 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?

    répondre: 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?

    répondre: 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?

    répondre: 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?

    répondre: 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?

    répondre: 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?

    répondre: 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?

    répondre: 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?

    répondre: You can find the 50mm Big Bore Cylinder Head Kit Assy with 69mm Valves for GY6 engines on Ubuy in Mali. 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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Avantages

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

Les inconvénients

  • May require slight adjustments for perfect fit

CONFIANCE EN LA PLATEFORME & PROTECTION DE L'ACHETEUR

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Jasmin
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“Great products and very good service: very easy and very fast international delivery.”

9 September 2026 · via Trustpilot
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“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”

10 September 2026 · via Trustpilot
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“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”

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“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”

11 September 2026 · via Trustpilot
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“Easy to find and order what you want on the website. Delivery is quick to the UK”

8 September 2026 · via Trustpilot
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Informations importantes

  • Limitations : Pour les produits expédiés à l'international, veuillez noter que toute garantie du fabricant peut ne pas être valide ; les options de service du fabricant peuvent ne pas être disponibles ; les manuels, instructions et avertissements de sécurité des produits peuvent ne pas être dans les langues du pays de destination ; les produits (et les matériaux qui les accompagnent) peuvent ne pas être conçus conformément aux normes, spécifications et exigences d'étiquetage du pays de destination ; et les produits peuvent ne pas être conformes à la tension et aux autres normes électriques du pays de destination (nécessitant l'utilisation d'un adaptateur ou d'un convertisseur le cas échéant). Il incombe au destinataire de s'assurer que le produit peut être importé légalement dans le pays de destination. En cas de commande auprès d'Ubuy ou de ses filiales, le destinataire est l'importateur officiel et doit se conformer à toutes les lois et réglementations du pays de destination.
  • Tous les produits listés sur Ubuy ne sont pas à vendre, Ubuy étant un moteur de recherche mondial. Les produits sont soumis aux réglementations en matière d'exportation et de commerce.