YAMAHA 1UY-11638-00 Nos Piston 4TH O/s

( Manufacturer Part Number: 1UY-11638-00 ), ( Part Type: Piston ), ( Country Of Origin: Japan )

Review YAMAHA Nos Piston 4th O/s 1987 2003 fits YFM350 2004–2005

Yamaha YFM350 Outboard Motor 1987-2003, 4-Cylinder, 196cc, 1987-2003 NOS Piston for 4th Overhead Cylinder

If you're in the market for a replacement piston for your Yamaha YFM350 outboard motor produced between 1987 and 2003, look no further. This is a New Old Stock (NOS) 4-cylinder piston specifically designed for the 196cc engine of the 4th overhead cylinder. It's an authentic, original equipment manufacturer (OEM) part, ensuring a perfect fit and reliable performance.

The piston is crafted from high-quality materials, engineered to meet the stringent specifications of Yamaha. It features a compact design optimized for power and fuel efficiency while maintaining durability and longevity. The piston also includes a piston ring set and a piston pin, making it a complete assembly for your engine.

Installing this piston in your Yamaha YFM350 outboard motor is a straightforward process. With its OEM design, you can trust that it will work seamlessly with your existing components, providing a smooth and powerful operation. The piston's top ring groove has a width of 1.5mm, ensuring a secure fit for the compression ring.

By investing in this NOS piston, you can restore the original performance of your Yamaha YFM350 outboard motor. It is a cost-effective solution compared to purchasing a rebuilt or remanufactured engine, allowing you to enjoy continued use of your watercraft while minimizing your expenses.

In summary, this Yamaha 1uy-11638-00 NOS piston is an essential component for maintaining the optimal performance of your 1987-2003 Yamaha YFM350 outboard motor. It's an authentic OEM part, designed for a perfect fit and reliable operation. By choosing this piston, you can save on the cost of a rebuilt engine and continue to enjoy your watercraft for years to come.

Buying a Yamaha YFM350 4th over-size piston, part number 1UY-11638-00, for a Yamaha motorcycle produced between 1987 and 2003 (models 199-2003) or between 2004 and 2005, has its advantages and disadvantages. Here's a detailed analysis without emojis or tables.

1. Performance Enhancement: A larger piston can increase engine displacement, leading to better power output and improved performance.

2. Durability: Over-size pistons are often made of stronger materials than OEM pistons, which can lead to increased engine lifespan and resistance to engine wear.

3. Improved Engine Efficiency: A larger piston can help the engine run more efficiently by reducing the amount of time the engine spends in the less efficient areas of the power stroke.

4. Customization: Installing a high-performance piston is a popular modification for motorcycle enthusiasts looking to enhance their bike's power and performance.

1. Cost: Aftermarket pistons, especially high-performance ones, can be quite expensive compared to OEM parts.

2. Installation Complexity: Installing an over-size piston requires more technical expertise and resources compared to a standard OEM piston replacement.

3. Engine Tuning: Installing a larger piston may require additional engine modifications to ensure optimal performance and prevent engine damage.

4. Potential Powerbalancing: Installing a larger piston on only one side of the engine may require powerbalancing to prevent engine damage and maintain overall engine performance.

The decision to buy a Yamaha YFM350 4th over-size piston, part number 1UY-11638-00, depends on your specific needs and budget. If you're looking for increased power and performance, this part can be an excellent investment. However, if you're on a tight budget or lack the necessary technical expertise for the installation, it may be best to stick with OEM parts. Additionally, consider if the benefits outweigh the potential drawbacks, such as the cost and complexity of installation. Ultimately, it's essential to weigh the pros and cons carefully before making a decision.

If you decide to proceed with the purchase of a Yamaha YFM350 4th over-size piston, ensure you source it from a reputable dealer to guarantee its quality and compatibility with your motorcycle model. Also, make sure you have the necessary technical expertise and resources for the installation process. If you're unsure, consider consulting a professional mechanic for advice and assistance.

Details:

This item is ideal for those who want to keep their motorcycle running smoothly and efficiently.yam pist bx 1>. The part number for this item is 1UY-11638-00 and it compatible with YFM350 model's from 1987 to 2005 .If you are looking a reliable replacement your motorcycle engine, Yamaha Piston 4th O/S the perfect choice. It is made in Japan and designed to fit perfectly with your Yamaha engine.

part #: 1uy1163800 prices

• $45.97-$88.76

specifications pistondon:

• for models: Yfm350
• for makes: Yamaha
• for years: 2004-2005
• mpn: 1uy-11638-00
• part type: Piston
• country of origin: Japan

seller pistondon:

• # reviews: 1366
• rating: 100.0%
• city: Houston, Texas

general pistondon:

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

returns pistondon:

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

payments pistondon:

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

shipping pistondon:

• class: Standard, Expedited
• carrier: USPS, FedEx
• service: USPS Ground Advantage, USPS Priority Mail, FedEx Ground / FedEx Home Delivery
• cost: $8.10
• type: Calculated
• transit: 4-10 Days

offer pistondon:

• availability: In Stock
• started: March 10, 2026
• quantity: 1
• best offers: True
• sold: 0
• options: Ship-to-home

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