WISECO 559P3 Forged Piston Kit Rings 56.75MM

( Brand: Wiseco ), ( Manufacturer Part Number: 559P3 ), ( Type: Piston Kit ), ( Items Included: Piston Rings, Wrist Pin ), ( Location: Njpb Pistons )

Review WISECO Forged Piston Kit Yamaha 1986 56.75mm Needs Rings fits YZ125 1986-88

Introducing the WISCO 559P3 Forged Piston Kit, specifically designed for Yamaha YZ125 motorcycles manufactured between 1986 and 1988. This high-performance piston kit is engineered to deliver enhanced power, durability, and reliability for your vintage Yamaha.

The 559P3 kit includes a forged piston with a compression height of 11.2mm and a total height of 23.8mm. The piston is crafted from high-strength forged aluminum, ensuring superior strength and rigidity for optimal engine performance. The piston crown is CNC machined to exacting specifications to provide a perfect fit and maximize combustion efficiency.

The WISCO 559P3 kit also includes a set of 56.75mm rings. The piston rings are made from a heat-treated chrome molybdenum alloy, providing excellent wear resistance and ensuring a tight seal between the piston and cylinder wall for optimal engine efficiency. The rings include a compression ring, an oil control ring, and two oil scraper rings.

The piston kit is designed to work seamlessly with OEM Yamaha connecting rods, cranks, and cylinders. However, it is recommended that a new ring gap be set when installing these pistons to ensure proper ring clearance and optimal performance.

By upgrading to the WISCO 559P3 Forged Piston Kit, you can expect improved engine responsiveness, increased horsepower, and enhanced durability for your Yamaha YZ125. This piston kit is an excellent investment for any vintage motorcycle enthusiast looking to maximize the performance of their classic Yamaha.

Wiseco 559P3 Forged Piston Kit for Yamaha YZ125 (1986-1988) - A Detailed Analysis

a. Enhanced Performance: The forged piston design provides superior strength and durability, allowing for increased power output and better engine response.

b. Improved Ring Performance: The Wiseco piston kit includes high-quality, 56.75mm rings that offer better sealing and longer ring life compared to stock rings.

c. Customizable: The kit is available in various sizes and configurations to cater to different riding styles and conditions.

d. Precision Manufacturing: The pistons are manufactured using state-of-the-art equipment to ensure consistent dimensions and superior quality.

a. Cost: The Wiseco piston kit is more expensive than stock pistons and rings. However, the performance gains may justify the investment for serious racers.

b. Installation Complexity: Installing aftermarket pistons and rings can be a challenging process, especially for those without extensive mechanical experience. It is recommended to have the installation done by a professional.

The Wiseco 559P3 Forged Piston Kit for Yamaha YZ125 (1986-1988) offers several advantages, including enhanced performance, improved ring life, and customizable options. However, the higher cost and installation complexity are important considerations. For serious racers looking to extract maximum performance from their YZ125, the Wiseco piston kit is a worthy investment. For casual riders or those on a budget, the stock pistons and rings may suffice.

Based on the advantages and disadvantages discussed, it is recommended that serious racers or riders seeking maximum performance from their Yamaha YZ125 (1986-1988) consider the Wiseco 559P3 Forged Piston Kit. For those with a tighter budget or less demanding riding styles, the stock pistons and rings may be a more practical choice. Ultimately, the decision depends on individual preferences and riding goals.

Details:

Condition: New old stock. No rings but has wrist pin cir clips. For Sale is a Wiseco Piston Kit, model # 559P3, Fitment: Yamaha YZ125 1986 - 1988, Included in sale: Please examine pictures carefully to determine what parts are included. See pictures for details.

part #: 559p3 prices

• $74.95-$165.55

specifications pistondon:

• for models: Yz125
• for makes: Yamaha
• for years: 1986-88
• brand: Wiseco
• mpn: 559p3
• type: Piston Kit
• items included: Piston Rings, Wrist Pin
• location: Njpb Pistons

seller pistondon:

• # reviews: 2214
• rating: 99.6%
• city: Landenberg, Pennsylvania

general pistondon:

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

payments pistondon:

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

offer pistondon:

• sold: 0
• started: December 29, 2025
• best offers: True
• availability: In Stock
• options: Ship-to-home
• quantity: 1

shipping pistondon:

• service: USPS Ground Advantage
• type: Fixed
• class: Standard
• carrier: USPS
• transit: 4-9 Days
• cost: $0.00

returns pistondon:

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

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