MMG
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MMG Crankshaft Assembly for GY6/QMB139 50cc to 80cc 4 stroke engines
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MMG Crankshaft Assembly for GY6/QMB139 50cc to 80cc 4 stroke engines
Inexpensive replacement for OEM crankshaft.
MMG Crankshaft Assembly for GY6/QMB139 50cc to 80cc 4 stroke engines
MMG

Item #: 11344778

MMG Crankshaft Assembly for GY6/QMB139 50cc to 80cc 4 stroke engines

Item #: 11344778

ISK 8535

Price Details

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

*All items will import from US

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us Imported from USA store

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Order now and get it around Thursday, July 02
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Inexpensive replacement for OEM crankshaft.
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What Stands Out

High Compatibility
Designed for GY6 and QMB139 engines, this crankshaft assembly fits 50cc to 80cc 4-stroke models, ensuring seamless integration and performance enhancement for various scooters and small vehicles.
Durable Construction
Crafted from high-quality materials, this crankshaft assembly promises longevity and reliability, reducing wear and tear while offering superior engine efficiency compared to many competitors.
Enhanced Performance
Optimized design boosts engine performance with smoother operation, better power delivery, and improved fuel efficiency, making it an ideal choice for gearheads seeking upgrades for their scooters or small motorcycles.

Product Details

Shop the best MMG Crankshaft Assembly for GY6QMB139 50cc to 80cc 4 stroke engines online at Ubuy Iceland. Get reliable performance and durability for your engine upgrade.
  • Inexpensive replacement for OEM crankshaft
  • Fits 50cc/80cc 4 Stroke GY6/QMB139 Engines
  • Stroke: 41.4mm, Overall Length: 246mm
  • Thread Size (tapered side): M10x1.25, Thread Size (spline side): M12x1.25
  • Bearing Outer Diameter (tapered side): 42mm, Bearing Outer Diameter (spline side): 47mm
  • Number of Splines: 26, Fitment for various scooters with 50cc 4 stroke engines
Item Weight4 lbs (1.81 kg)

Who Should Buy?

Suitable For
  • Scooter Enthusiasts

    Ideal for users looking to upgrade or replace their GY6/QMB139 engine crankshaft for improved performance.

  • DIY Mechanics

    Perfect for hobbyists who enjoy building or repairing small engine scooters using GY6/QMB139 parts.

  • Budget Riders

    Cost-effective solution for those needing a reliable crankshaft without spending on high-end performance parts.

Not Suitable For
  • High Performance Users

    Not suitable for those seeking high-end performance upgrades beyond the standard specifications of GY6 engines.

  • Heavy Load Applications

    Users intending to use their scooters for heavy-duty purposes may require a more robust crankshaft assembly.

  • Non-GY6 Engines

    Incompatible with engines outside the GY6/QMB139 class, making it unsuitable for different scooter models.

Product Description

MMG Crankshaft Assembly for GY6/QMB139 50cc to 80cc 4 stroke engines

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What is the compatibility of the MMG Crankshaft Assembly for GY6QMB139?

    Answer: The MMG Crankshaft Assembly is specifically designed for GY6QMB139 50cc to 80cc 4 stroke engines. This means it fits a wide range of scooters, mopeds, and small motorcycles that use this engine type. It provides a perfect fit and optimal performance by ensuring that all components work seamlessly together, reducing vibrations and enhancing engine efficiency.
  • Question: How do I install the MMG Crankshaft Assembly?

    Answer: Installing the MMG Crankshaft Assembly requires some mechanical knowledge and specific tools. Begin by stripping down the engine case to access the crankshaft. Carefully remove the old crankshaft and replace it with the MMG assembly, ensuring all seals and bearings are properly positioned. Follow manufacturer guidelines for torque specifications when reassembling. If you're unfamiliar with engine work, consulting a mechanic is advised.
  • Question: What materials is the MMG Crankshaft Assembly made from?

    Answer: The MMG Crankshaft Assembly is typically constructed from high-quality steel alloys, designed to withstand significant stress and deliver reliable performance. The materials used ensure durability and longevity, even under heavy use. This is crucial for maintaining engine performance over time, as high-quality materials help prevent premature wear and failures.
  • Question: What are the benefits of upgrading to the MMG Crankshaft Assembly?

    Answer: Upgrading to the MMG Crankshaft Assembly provides several benefits, such as improved engine efficiency and increased power output. By enhancing the smoothness of the engine's operation, this assembly can lead to better acceleration and overall performance. Scenarios where you might notice the changes include navigating hilly terrains or carrying heavier loads, where power and reliability become crucial.
  • Question: Can the MMG Crankshaft Assembly improve fuel efficiency?

    Answer: Yes, the MMG Crankshaft Assembly can contribute to improved fuel efficiency. A well-balanced crankshaft reduces friction and optimizes the engine's performance, which allows for better fuel combustion. This means you may find yourself using less fuel for the same distance, making it a cost-effective solution for daily commutes and longer rides.
  • Question: What tools are needed to replace the crankshaft assembly?

    Answer: To replace the MMG Crankshaft Assembly, you'll need basic hand tools such as wrenches, sockets, and screwdrivers. Additionally, a torque wrench is essential for ensuring all components are tightened to specifications. Advanced tools like a crankshaft puller may also be required for easier removal and installation of the crankshaft itself, making the process smoother and preventing damage to engine components.
  • Question: Is the MMG Crankshaft Assembly suitable for high-performance builds?

    Answer: The MMG Crankshaft Assembly is suitable for mid-range performance rather than extreme high-performance builds. It enhances standard engine performance, making it a great choice for those looking to improve their scooters or small bikes without going to extreme levels. For example, if you're upgrading your 50cc scooter for better daily commuting efficiency, this assembly would be a perfect match.
  • Question: What signs indicate that I need to replace my crankshaft assembly?

    Answer: Signs of needing a crankshaft assembly replacement include unusual vibrations, knocking sounds from the engine, or a decrease in power and acceleration. If you experience these issues, it suggests that the components may be worn or damaged, affecting overall engine function. Addressing these issues with an upgrade to the MMG Crankshaft Assembly can restore performance and prevent further damage.
  • Question: Can I use the MMG Crankshaft Assembly for off-road applications?

    Answer: While the MMG Crankshaft Assembly is primarily designed for on-road use, it can be used in light off-road applications as well. It provides better durability and sturdiness, but for heavy off-road riding, consider stronger alternatives. If you plan to use your vehicle off-road frequently, always monitor for wear and ensure that other components are suited for rough conditions.
  • Question: Where can I buy MMG Crankshaft Assembly for GY6QMB139 50cc to 80cc 4 stroke engines?

    Answer: You can buy the MMG Crankshaft Assembly for GY6QMB139 50cc to 80cc 4 stroke engines at Ubuy in Iceland. Ubuy offers a wide selection of automotive parts and tools, ensuring a smooth purchasing process and various shipping options, suitable for getting the parts you need.

MMG Crankshafts Editorial Review

The MMG Crankshaft Assembly is designed for GY6QMB139 50cc to 80cc 4 stroke engines. This stock crankshaft fits long-case type 50cc motors and is strong enough to use with a 100cc BBK. Oil seals must be replaced when replacing the crankshaft. Customers have reported mixed experiences with this product, with one stating that it tore up three flywheels, while another claimed that it was excellent and as described.

Customer Reviews & Ratings

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Pros

  • -Designed for GY6QMB139 50cc to 80cc 4 stroke engines -Fits long-case type 50cc motors -Strong enough to use with a 100cc BBK

Cons

  • -Mixed customer experiences

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.

ISK 8535

Order now and get it around Thursday, July 02

QTY:

Secured transactionsecured transaction

Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.

Our Top Logistics Partners
  • fedex
  • dhl
Fastest cross-border delivery

Features & Benefits

  • Thread Size (tapered side): M10x1.25
  • Thread Size (spline side): M12x1.25
  • Bearing Outer Diameter (tapered side): 42mm
  • Bearing Outer Diameter (spline side): 47mm
  • Number of Splines: 26
  • Fits 50cc/80cc 4 Stroke GY6/QMB139 Engines.