0 ratings
GOOFIT 39mm Cylinder Head with 64mm Valve for 4 Stroke GY6 49cc 50cc ATV Scooter Moped 139QMA 139QMB Engine Part
GOOFIT 39mm Cylinder Head with 64mm Valve for 4 Stroke GY6 49cc 50cc ATV Scooter Moped 139QMA 139QMB Engine Part
GOOFIT 39mm Cylinder Head with 64mm Valve for 4 Stroke GY6 49cc 50cc ATV Scooter Moped 139QMA 139QMB Engine Part
GOOFIT 39mm Cylinder Head with 64mm Valve for 4 Stroke GY6 49cc 50cc ATV Scooter Moped 139QMA 139QMB Engine Part
GOOFIT 39mm Cylinder Head with 64mm Valve for 4 Stroke GY6 49cc 50cc ATV Scooter Moped 139QMA 139QMB Engine Part
GOOFIT 39mm Cylinder Head with 64mm Valve for 4 Stroke GY6 49cc 50cc ATV Scooter Moped 139QMA 139QMB Engine Part
GOOFIT 39mm Cylinder Head with 64mm Valve for 4 Stroke GY6 49cc 50cc ATV Scooter Moped 139QMA 139QMB Engine Part
High toughness, corrosion resistance, rustproof and durable.
GOOFIT 39mm Cylinder Head with 64mm Valve for 4 Stroke GY6 49cc 50cc ATV Scooter Moped 139QMA 139QMB Engine Part
Item #: 224259385

GOOFIT 39mm Cylinder Head with 64mm Valve for 4 Stroke GY6 49cc 50cc ATV Scooter Moped 139QMA 139QMB Engine Part

Item #: 224259385

LAK 833210

Price Details

Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )

*All items will import from US

0 ratings Write a review
In stock
us Imported from USA store

QTY:

Only 10 items left in stock.
Order now and get it around Thursday, July 23
Our Top Logistics Partners
  • fedex
  • dhl
High toughness, corrosion resistance, rustproof and durable.
Show More
U-Care Warranty:
None
Select a Plan
fast shipping

Fast
Shipping

free return

Free
Return*

secure packaging

Secure Packaging

100% original products

100% Original Products

pci-dss

PCI DSS Compliance

iso certified

ISO 27001 Certified


paypal payment
visa payment
mastercard payment
Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.

What Stands Out

High Performance
Engineered for enhanced combustion efficiency and power output, this cylinder head optimizes performance for 49cc and 50cc GY6 engines, ensuring smoother acceleration and improved overall functionality.
Durable Construction
Manufactured with high-quality materials, the GOOFIT cylinder head is designed for longevity, resisting wear and tear, thereby providing reliable performance over extended periods, making it a valuable investment for your vehicle.
Easy Installation
Designed for straightforward compatibility with ATV, scooter, and moped engines, the GOOFIT cylinder head allows for quick and hassle-free installation, enabling enthusiasts to upgrade their ride without extensive mechanical expertise.

Product Details

Shop for high-quality GOOFIT cylinder head with valve for 4 stroke GY6 49cc 50cc scooters and mopeds. Find the perfect replacement part for Kymco, Jonway, Tank, and Jinlun scooters. Fast shipping and excellent after-sales service at Ubuy Laos.
  • Mounting hole distance:50mm/2.0";Intake valve diameter:18.6mm/0.73",Exhaust valve diameter:16mm/0.63";Valve length:64mm/2.5".(As the picture shows)
  • High quality cylinder replacement part.High toughness,corrosion resistance,rustproof and durable.Has a good heat dissipation structure design,providing reliable performance and long life service.
  • Suitable for valves with a length of 64mm , not suitable for valves with a length of 69mm.Please verify model number and size prior to ordering to ensure this is the correct part.
  • Fit for 4 stroke GY6 49cc 50cc Scooter Moped ATV.(read description for fitment infos)

Product Technical Details

Manufacturer‎GOOFIT
Brand‎GOOFIT
Item Weight‎1.76 ounces
Package Dimensions‎5.79 x 5.35 x 3.03 inches
Item model number‎Group-98
Is Discontinued By Manufacturer‎No
Manufacturer Part Number‎Group-98
Voltage‎12 Volts

Product Description

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What is the compatibility of the GOOFIT 39mm Cylinder Head with 64mm Valve?

    Answer: The GOOFIT 39mm Cylinder Head is specifically designed for 4-stroke GY6 engines, including the 49cc and 50cc models commonly found in ATVs, scooters, and mopeds. This compatibility ensures proper fit and function, enhancing performance. Utilizing this part can significantly improve the engine's combustion efficiency, leading to better power output and responsiveness. Users typically find this head particularly useful in performance upgrades or as a direct replacement in older models.
  • Question: What are the key features of the GOOFIT 39mm Cylinder Head?

    Answer: Key features of the GOOFIT 39mm Cylinder Head include its durable construction, precision-engineered 64mm valve, and compatibility with highly used GY6 139QMA and 139QMB engine models. The robust design promotes reliable operation under various conditions, making it suitable for both casual and performance-oriented riders. This part is particularly favored for enhancing throttle response and overall engine durability, upheld by numerous customer reviews praising its performance in modified vehicles.
  • Question: Can this cylinder head improve engine performance?

    Answer: Yes, the GOOFIT 39mm Cylinder Head can substantially improve engine performance. It features a larger valve size, which allows for greater airflow, translating to more horsepower and torque. For enthusiasts looking to boost acceleration or for daily riders needing reliable performance, upgrading to this component helps achieve a more dynamic driving experience. Additionally, it can aid in higher speeds and better hill-climbing abilities in ATVs and scooters.
  • Question: Is installation of the GOOFIT Cylinder Head complicated?

    Answer: The installation of the GOOFIT 39mm Cylinder Head is straightforward for those familiar with engine mechanics. Generally, it requires basic tools and knowledge of ATV or scooter engine assembly. The process typically involves removing the old cylinder head, cleaning the mating surfaces, and carefully installing the new head. For beginners, referring to service manuals or instructional videos can aid in the installation process, ensuring a correct setup that maximizes performance.
  • Question: What maintenance does the GOOFIT Cylinder Head require?

    Answer: Maintenance for the GOOFIT 39mm Cylinder Head primarily involves regular checks for any oil leaks, ensuring that the gasket remains intact, and monitoring for any performance issues. It’s also advisable to regularly inspect the valve clearance as it can change with use. Keeping up with routine maintenance ensures longevity and optimal performance, helping to catch any potential issues early on and maintaining the cylinder head's efficiency in various riding conditions.
  • Question: What improvements can I expect with this performance part?

    Answer: Installing the GOOFIT 39mm Cylinder Head can result in significant improvements in acceleration, speed, and overall engine responsiveness. Users often report enhanced throttle response, better climbing ability, and an increase in horsepower. Whether you’re upgrading for recreational use or daily commuting, this cylinder head is an effective part that elevates the performance of 49cc and 50cc unit. It ultimately allows for a more enjoyable riding experience.
  • Question: Are there any specific brands or models it is ideal for?

    Answer: The GOOFIT 39mm Cylinder Head is ideal for various brands that utilize the GY6 engine platform, particularly the 139QMA and 139QMB models. This encompasses a wide range of scooters, mopeds, and ATVs, presenting versatile applications. Riders appreciate this compatibility as it simplifies the search for performance parts, allowing for straightforward enhancements across many popular vehicle types within this category.
  • Question: How do I know if I need to replace my current cylinder head?

    Answer: Signs that indicate it may be time to replace your cylinder head include decreased performance, unusual engine noises, or visible signs of wear and tear, such as cracking or corrosion. If your vehicle experiences overheating or you notice oil leaks around the cylinder head, these are critical indicators. Upgrading to the GOOFIT Cylinder Head not only addresses these issues but can also prevent potential engine damage, ensuring reliable performance.
  • Question: What is the significance of the 64mm valve in this cylinder head?

    Answer: The 64mm valve in the GOOFIT 39mm Cylinder Head plays a crucial role in enhancing engine airflow and combustion efficiency. A larger valve size allows for more air-fuel mixture to enter the combustion chamber, increasing horsepower and torque output. This feature is particularly beneficial for those modifying their engines for increased performance, as the efficient airflow contributes to better acceleration and overall engine responsiveness in various riding scenarios.
  • Question: Where can I buy GOOFIT 39mm Cylinder Head with 64mm Valve for 4 Stroke GY6 49cc 50cc ATV Scooter Moped 139QMA 139QMB Engine Part?

    Answer: You can buy the GOOFIT 39mm Cylinder Head with 64mm Valve at Ubuy, a trusted online retailer where you can find a wide selection of automotive parts. Ubuy is known for its commitment to quality and customer satisfaction, making it a reliable choice for purchasing performance-enhancing components. With user-friendly navigation and comprehensive product descriptions, you can find the exact part you need for your vehicle with ease.

GOOFIT Cylinder Heads ‎Group-98 Editorial Review

No editorial reviews found

Customer Reviews & Ratings

3.7
102 customers ratings
  • 5 Star
    50%
  • 4 Star
    16%
  • 3 Star
    10%
  • 2 Star
    8%
  • 1 Star
    16%

Review this product

Share your thoughts with other customers

Platform Trust & Buyer Confidence

trustpilot logo
4.3/5 9,000 + reviews
Read reviews
MT
Mohd
Verified buyer

“The product received very good packaging & safe…Thank You”

16 June 2026 · via Trustpilot
SJ
Shawati
Verified buyer

“Accurate delivery timing given”

16 June 2026 · via Trustpilot
YB
Youcef
Verified buyer

“Not madly expensive like I thought, and much quicker than promised.”

15 June 2026 · via Trustpilot
LM
Leila
Verified buyer

“Never dealt with Ubuy before, but everything worked out great. Seamless cross border purchasing and shipping. Thanks!”

6/7/2026 · via Trustpilot
KA
Kwame
Verified buyer

“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”

12 June 2026 · via Trustpilot
Secure Checkout Global Delivery Easy Returns Genuine Products

Related Categories

Related Brands

Product Price History

Important information

  • 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.
  • Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.