YAMAHA 4V2-11311-00-00 Cylinder Jug Steel Sleeve 57.50MM

( Manufacturer Part Number: 4V2-11311-00-00 ), ( Type: Cylinder Jug ), ( Machine Type: Off-road Motorcycle ), ( Country Of Origin: Japan )

Review YAMAHA Cylinder Jug 57.50mm Steel Sleeve fits YZ125 YZ 125 57 1981

Introducing the Yamaha 4V2-11311-00-00 81 1981 YZ125 cylinder jug, a crucial component for the restoration or customization of your vintage YZ125 motorcycle. This cylinder jug is specifically designed for the 1981 model year YZ125 motorcycle, ensuring a perfect fit and optimal performance.

The cylinder jug is made from high-quality steel, with a sleeved bore diameter of 57.50mm. The steel sleeve provides added durability and strength to the cylinder, enhancing the longevity of your engine. The sleeved design also allows for easier bore honing and cylinder reboring, making it an ideal choice for engine rebuilds or upgrades.

This Yamaha cylinder jug features a 4-stroke, single-cylinder, air-cooled design, with a capacity of 124.7 cc. It comes complete with the piston, rings, and gaskets required for installation. The piston is made from forged aluminum, providing excellent strength and heat resistance, while the rings are made from high-tensile materials for optimal ring sealing and engine compression.

The cylinder jug also includes the necessary studs and nuts for mounting the cylinder to the crankcase. The studs are made from high-strength material, ensuring a secure and reliable connection between the cylinder and crankcase.

This Yamaha 4V2-11311-00-00 81 1981 YZ125 cylinder jug is a must-have for any YZ125 enthusiast or restoration project. It is manufactured to meet the highest standards of quality and precision, ensuring a perfect fit and optimal performance. Whether you're looking to restore your vintage motorcycle to its original glory or customize it for added power and style, this cylinder jug is an essential addition to your project.

In summary, the Yamaha 4V2-11311-00-00 81 1981 YZ125 cylinder jug is a high-quality, steel-sleeved component designed for the 1981 YZ125 motorcycle. It features a 57.50mm bore diameter, a forged aluminum piston, high-tensile rings, and all necessary hardware for installation. This cylinder jug is an ideal choice for engine rebuilds, upgrades, or restoration projects, ensuring optimal performance and added durability for your YZ125 motorcycle.

Pros and Cons of Buying a Yamaha YZ125 Cylinder Jug with Steel Sleeve (Part Number: 4V2-11311-00-00)

The Yamaha YZ125 is a legendary motorcycle known for its high-performance capabilities. The cylinder jug with a steel sleeve is a crucial component of the engine. If you are considering purchasing the Yamaha 4V2-11311-00-00 81 1981 YZ125 cylinder jug with a steel sleeve, this article will help you make an informed decision by discussing its pros and cons.

1. Durability: The steel sleeve provides an additional layer of protection against wear and tear, making the cylinder jug more durable.

2. Enhanced Power: A steel sleeve can improve engine performance by allowing for a closer piston-wall clearance, which can increase compression and horsepower.

3. Longer Engine Life: The steel sleeve can help extend the life of the engine by preventing piston-wall scuffing and reducing the need for frequent reboring.

1. Cost: The Yamaha 4V2-11311-00-00 81 1981 YZ125 cylinder jug with steel sleeve is a more expensive option compared to a standard cylinder jug without a steel sleeve.

2. Weight: The steel sleeve adds extra weight to the engine, which can negatively impact the overall performance and handling of the motorcycle.

3. Complexity: Installing a cylinder jug with a steel sleeve can be a more complex process compared to installing a standard cylinder jug.

The decision to purchase the Yamaha 4V2-11311-00-00 81 1981 YZ125 cylinder jug with a steel sleeve depends on your priorities as a rider. If you value durability, enhanced power, and longer engine life, this option may be worth the investment, despite the added cost, weight, and complexity. On the other hand, if you are looking for the most cost-effective solution, a standard cylinder jug may be a better choice for you.

If you are an avid Yamaha YZ125 rider who values high performance and longevity, the Yamaha 4V2-11311-00-00 81 1981 YZ125 cylinder jug with a steel sleeve is a worthwhile investment. However, if you are a casual rider or are on a tight budget, a standard cylinder jug may be a more suitable option for you. Ultimately, consider your riding style, budget, and goals before making a decision.

Details:

1981 Yamaha YZ125 cylinder, 57.50mm steel sleeve bore, bore has rust and pitting, nothing very deep. Threads good. Includes intake manifold coolant tube and reeds, has dents on each side onto surface should not affect as o ring seal groove doing most of the work. Reeds need cleaning not sure if worn.

As shown in photos.

part #: 4v2113110000 prices

• $111.86-$155.48

specifications cylindermotorcycleiz:

• for models: Yz125, Yz, 125, 57
• for makes: Yamaha
• for years: 1981
• mpn: 4v2-11311-00-00
• type: Cylinder Jug
• machine type: Off-road Motorcycle
• country of origin: Japan

offer cylindermotorcycleiz:

• options: Ship-to-home
• availability: In Stock
• sold: 0
• started: February 7, 2026
• quantity: 1

seller cylindermotorcycleiz:

• city: Tyngsboro, Massachusetts
• rating: 99.7%
• # reviews: 2596

payments cylindermotorcycleiz:

• wallet: Apple-pay
• credit card: Visa
• other

general cylindermotorcycleiz:

• condition: For parts or not working
• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Cylinder Heads

shipping cylindermotorcycleiz:

• type: Calculated
• carrier: USPS
• cost: $14.58
• transit: 4-10 Days
• class: Standard, Expedited
• service: USPS Ground Advantage, USPS Priority Mail

returns cylindermotorcycleiz:

• policy: No Returns

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