YAMAHA Nos Piston .25 1W5-11635-00

( Manufacturer Part Number: 1W51163500 ), ( Engine Type: 2-stroke ), ( Type: Piston ), ( Machine Type: Dual Sport Motorcycle ), ( Oe/oem Part Number: 1wt-11635 ), ( Items Included: Piston Rings ), ( Vintage Part: Yes ), ( Performance Part: No )

Review YAMAHA Nos Oem Piston .25 1st Over fits IT250 1977–1978

The Yamaha 1W51163500 NOS (New Old Stock) piston is a genuine replacement part designed for use in IT250 two-stroke outboard engines manufactured by Yamaha between the years 1977 and 1978. This piston is specifically numbered as a 25, making it suitable for engines with that designation.

This piston is meticulously crafted from high-quality materials, ensuring reliable performance and durability. The piston crown is engineered to provide optimal combustion efficiency, while the skirt is designed to minimize friction and wear. The piston rings are included with the part, ensuring a proper seal and preventing excessive oil consumption.

The piston features a compact design to minimize weight and maximize power output. The piston pin bore is precision machined to ensure a snug fit and proper alignment with the crankshaft. The piston also comes with a piston pin and piston pin retaining clip, making it a complete assembly that is ready to be installed.

This NOS piston is an excellent choice for restoring vintage Yamaha IT250 outboard engines to their original condition. The use of New Old Stock parts ensures that the engine will perform as it did when it was first manufactured, providing a authentic and reliable experience for boaters and collectors alike.

The piston is easy to install, with clear instructions and diagrams provided in the accompanying documentation. The part comes packaged in protective materials to ensure safe transportation and handling.

In summary, the Yamaha 1W51163500 NOS piston is a high-quality replacement part designed for use in IT250 two-stroke outboard engines manufactured between 1977 and 1978. It is meticulously crafted from high-quality materials to provide optimal performance and durability, and comes complete with piston rings, piston pin, and piston pin retaining clip. This piston is an excellent choice for restoring vintage Yamaha outboard engines to their original condition.

The Yamaha 1W51163500 NOS piston is a replacement part designed for IT250 engines manufactured by Yamaha between 1977 and 1978. Here are some potential pros and cons of purchasing this part:

1. OEM (Original Equipment Manufacturer) Part: This piston is a direct replacement manufactured by Yamaha, ensuring a proper fit and function.

2. High-Quality Material: The piston is likely made of aluminum alloy or other high-strength materials, ensuring durability and reliability.

3. Improved Performance: A new piston can lead to improved engine performance, including increased power and torque.

4. Long-Lasting Solution: A new piston can last for thousands of miles, providing a long-term solution to engine issues.

5. Enhanced Safety: A faulty or worn-out piston can lead to engine damage or failure, so replacing it with a new one can enhance safety.

1. Cost: Replacement pistons can be expensive, especially for older models like the IT250.

2. Installation Complexity: Installing a piston requires significant engine disassembly, making it a complex and time-consuming process.

3. Potential for Other Issues: A worn-out piston may be a symptom of other engine issues, so replacing the piston alone may not solve all problems.

4. Availability: Replacement pistons for older models may be harder to find, requiring additional effort and cost to source.

The decision to purchase a Yamaha 1W51163500 NOS piston depends on the specific circumstances of your engine and your priorities. If you value reliability, safety, and performance, and are willing to invest in a high-quality part, then this piston may be a worthwhile investment. However, if cost is a significant concern, or if you are unsure about the complexity of the installation process, then it may be worth considering alternative options, such as rebuilding the engine or selling the vehicle altogether. Ultimately, the best course of action will depend on your budget, expertise, and goals.

If you have decided to purchase a Yamaha 1W51163500 NOS piston, then it is recommended to source it from a reputable dealer or distributor to ensure authenticity and quality. Additionally, it is important to carefully follow the installation instructions provided by Yamaha to ensure proper installation and prevent any potential issues. If you are unsure about the installation process or have any concerns, it may be worth consulting a professional mechanic for assistance.

Details:

This brand new in the original box, box is fair shape.

part #: 1w51163500 prices

• $25.00-$48.95

specifications pistondon:

• for models: It250
• for makes: Yamaha
• for years: 1977-1978
• mpn: 1w51163500
• engine type: 2-stroke
• type: Piston
• machine type: Dual Sport Motorcycle
• oe/oem part number: 1wt-11635
• items included: Piston Rings
• vintage part: Yes
• performance part: No

payments pistondon:

• credit card: Mastercard
• other
• cash
• wallet: Google-pay

general pistondon:

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

offer pistondon:

• quantity: 1
• sold: 0
• started: December 20, 2025
• options: Ship-to-home
• best offers: True
• availability: In Stock

returns pistondon:

• policy: No Returns

seller pistondon:

• # reviews: 1654
• city: Brooklyn, New York
• rating: 98.6%

shipping pistondon:

• carrier: USPS
• service: USPS Ground Advantage
• cost: $0.00
• class: Standard
• type: Fixed
• transit: 6-10 Days

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