YAMAHA 537-11638-02 Nos Piston 4TH O/s 1.00MM 57.00MM

( Manufacturer Part Number: 537-11638-02 ), ( Engine Type: 2-stroke ), ( Type: Piston ), ( Vintage Part: Yes ), ( Country Of Origin: Japan )

Review YAMAHA Nos 4th O/s 1.00mm 57.00mm Piston fits MX125 YZ125 57 1976–1977

Introducing the Yamaha 1.00mm, 57.00mm piston (Part No: 537-11638-02) designed specifically for the 1976 MX125 and 1977 YZ125 motorcycles. This piston is a crucial component of your engine, responsible for transferring power from the combustion process to the connecting rod.

Crafted from high-quality materials, this piston is precision-engineered to ensure optimal performance and durability. The piston features a 1.00mm thick ring land, which provides a solid foundation for the compression rings. This design enhances the piston's ability to withstand the intense pressure generated during the combustion process, ensuring consistent power delivery.

Measuring 57.00mm in diameter, this piston is suitable for use in the 125cc two-stroke engines found in the 1976 MX125 and 1977 YZ125 motorcycles. Its precise dimensions ensure a perfect fit and efficient engine operation.

The piston also features a skirt that is designed to minimize friction and wear during engine operation. This is achieved through the use of a state-of-the-art skirt coating technology that reduces friction between the piston and the engine cylinder.

This replacement piston is an excellent choice for those seeking to restore their vintage motorcycles to their former glory or for riders who need a reliable spare part for their off-road adventures. By upgrading to this high-performance piston, you can expect improved engine power and efficiency, making your motorcycle a formidable force on the track or trail.

In summary, the Yamaha 1.00mm, 57.00mm piston (Part No: 537-11638-02) is a top-quality component designed specifically for use in the 1976 MX125 and 1977 YZ125 motorcycles. This piston's precision engineering, high-quality materials, and innovative designs make it an essential upgrade for riders looking to maximize their engine's performance and reliability.

Pros and Cons of Buying a Yamaha 1976 MX125/1977 YZ125 1.00mm 57.00mm Piston (4th Overhead Stock)

The Yamaha 1976 MX125 and 1977 YZ125 are iconic motorcycles that have stood the test of time. However, like any machine, they require regular maintenance and upgrades. One such upgrade is the piston. In this article, we will discuss the pros and cons of buying a Yamaha 537-11638-02 1.00mm 57.00mm piston (4th overhead stock) for these motorcycles.

1. Enhanced Performance: A new piston can improve engine performance by ensuring a proper seal between the piston and the cylinder, reducing compression losses and improving power delivery.

2. Increased Durability: A high-quality piston can increase the lifespan of the engine by reducing wear and tear.

3. Better Fuel Efficiency: A well-functioning piston can improve fuel efficiency by reducing friction and improving combustion efficiency.

4. Reduced Engine Noise: A new piston can help reduce engine noise by ensuring a proper fit and reducing the amount of wear-induced vibrations.

1. Cost: Replacing a piston can be a costly affair, especially if you choose to buy an OEM (Original Equipment Manufacturer) part like the Yamaha 537-11638-02.

2. Installation Complexity: Installing a piston is a complex process that requires specialized tools and knowledge. It is recommended to have the piston installed by a professional mechanic.

3. Potential for Damage: If not installed correctly, a new piston can be damaged, leading to additional costs and downtime.

The decision to buy a Yamaha 537-11638-02 1.00mm 57.00mm piston (4th overhead stock) for a 1976 MX125 or 1977 YZ125 depends on various factors, including your budget, riding style, and the condition of your engine. If you are an avid rider or use your motorcycle extensively, investing in a high-quality piston can lead to improved performance, increased durability, better fuel efficiency, and reduced engine noise. However, the cost and installation complexity are significant drawbacks. Therefore, it is essential to weigh the pros and cons carefully before making a purchase.

If you decide to buy a new piston for your Yamaha 1976 MX125 or 1977 YZ125, it is recommended to purchase the Yamaha OEM part (537-11638-02) for optimal performance and durability. Additionally, it is essential to have the piston installed by a professional mechanic to ensure proper installation and avoid potential damage.

Details:

Yamaha Box # row 529.

part #: 5371163802 prices

• $29.99-$164.95

specifications pistondon:

• for models: Mx125, Yz125, 57
• for makes: Yamaha
• for years: 1976-1977
• mpn: 537-11638-02
• engine type: 2-stroke
• type: Piston
• vintage part: Yes
• country of origin: Japan

seller pistondon:

• # reviews: 25532
• rating: 99.8%
• city: Ransomville, New York

general pistondon:

• condition: New
• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits

payments pistondon:

• other
• wallet: Paypal
• credit card: Diners-club

offer pistondon:

• started: October 28, 2025
• sold: 0
• quantity: 1
• availability: In Stock
• options: Ship-to-home

returns pistondon:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller

shipping pistondon:

• service: Economy
• cost: $0.00
• class: Economy
• transit: 3-7 Days
• type: Fixed

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