GY6 HS-239 Cylinder 171CC

( Brand: Gy6 ), ( Manufacturer Part Number: HS-239 ), ( Engine Type: 4-stroke ), ( Type: Cylinder Bore Kit ), ( Machine Type: Scooter )

Review GY6 171cc Drop In Bore Cylinder

Introducing the Gy6 HS-239 171cc cylinder, a high-performance and reliable engine component designed for go-karts and other small engine applications. This cylinder is manufactured with precision and attention to detail, ensuring optimal engine efficiency and power output.

The Gy6 HS-239 cylinder is constructed from high-quality aluminum alloy, providing excellent heat dissipation and durability. Its bore size is 57.5mm, and the stroke length is 52.5mm, resulting in a displacement of 171cc. The cylinder features a precision-machined bore and honed finish, providing a perfect seal with the piston for efficient combustion and minimal power loss.

The Gy6 HS-239 cylinder is designed to work seamlessly with the Gy6 HS engine series, providing a power output of approximately 11 horsepower at 7,500 RPM. The cylinder comes with a pre-installed piston and rings, making it a complete replacement part for those in need of an engine upgrade or repair.

The cylinder head is equipped with a single overhead camshaft (SOHC) design, which allows for efficient valve operation and optimal engine performance. The intake and exhaust ports are designed to provide maximum airflow, ensuring the engine receives ample fuel-air mixture for efficient combustion.

The Gy6 HS-239 cylinder also features a chrome-plated cylinder liner, which provides excellent wear resistance and durability. The cylinder is also compatible with various types of fuel, including gasoline and ethanol-blended fuels, making it a versatile option for various engine applications.

In conclusion, the Gy6 HS-239 171cc cylinder is a high-quality and reliable engine component designed for go-karts and other small engine applications. Its precision machining, high-quality materials, and efficient design provide optimal engine performance, power output, and durability. Whether you're looking to upgrade your engine or replace a worn-out component, the Gy6 HS-239 cylinder is an excellent choice.

The Gy6 HS-239 171cc cylinder is a popular choice for go-kart and small engine applications due to its reliability and power. Here are some pros and cons to help you decide if this cylinder is the right choice for your needs:

1. Powerful: This cylinder delivers a good amount of power, making it suitable for various go-kart classes and other applications where a powerful engine is required.

2. Durable: The Gy6 HS-239 cylinder is known for its durability, which is essential for high-performance applications where the engine may be subjected to heavy usage.

3. Wide Availability: This cylinder is widely available, which makes it easy to find replacement parts and get technical support when needed.

4. Affordable: Compared to other high-performance cylinders, the Gy6 HS-239 is relatively affordable, making it a cost-effective option for many applications.

1. Not Suitable for Emission Regulations: This cylinder does not meet emission regulations, making it unsuitable for use in areas where emissions standards are strict.

2. Requires Regular Maintenance: Like all engines, the Gy6 HS-239 requires regular maintenance to ensure optimal performance and longevity.

3. May Require Modifications: Depending on the specific application, the Gy6 HS-239 may require modifications to fit properly, which can add to the cost and complexity of the project.

In conclusion, the Gy6 HS-239 171cc cylinder is a reliable and powerful option for various go-kart and small engine applications. Its durability, wide availability, and affordability make it a popular choice among enthusiasts. However, it may not meet emission regulations, and it requires regular maintenance and potential modifications to fit properly. If you're looking for a powerful and cost-effective engine option for a high-performance application, the Gy6 HS-239 is definitely worth considering. However, be sure to weigh the pros and cons carefully and consider any potential modifications or maintenance requirements before making a purchase.

Details:

Manufactured for Gy6 150cc this product is specifically designed easy installation with its drop-in bore design. The 171cc Drop In Bore Cylinder is a high-quality cylinder bore kit designed for scooters with 4-stroke engine. The manufacturer part number HS-239 ensures compatibility and reliable performance. Purchased for my 2023 Vita's Rocket 150cc, but bike was recently stolen, so loss is your gain.

Brand new in the box.

part #: hs239 prices

• $57.90-$106.92

specifications cylindermotorcycleiz:

• brand: Gy6
• mpn: Hs-239
• engine type: 4-stroke
• type: Cylinder Bore Kit
• machine type: Scooter

offer cylindermotorcycleiz:

• best offers: True
• quantity: 1
• started: November 23, 2025
• sold: 0
• availability: In Stock
• options: Ship-to-home

returns cylindermotorcycleiz:

• policy: No Returns

payments cylindermotorcycleiz:

• credit card: Visa
• wallet: Paypal
• other

shipping cylindermotorcycleiz:

• type: Calculated
• transit: 6-12 Days
• service: USPS Ground Advantage
• class: Standard
• carrier: USPS
• cost: $55.00

seller cylindermotorcycleiz:

• rating: 100.0%
• city: Boston, Massachusetts
• # reviews: 4

general cylindermotorcycleiz:

• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Cylinder Heads
• condition: New

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