100-252K CORE-PARTS Piston Jet Kit Yamaha

Review CORE-PARTS Piston Kit For 1989 2008 Yamaha Cyl 2.638 Bore 50 Jet 40 for YAMAHA 1991–2001

Introducing the Core-Parts 100-252K piston kit, an exceptional replacement solution for the Yamaha Jet 40 models produced between 1991 and 2001. This piston kit is specifically designed for the 1989-2008 Yamaha 2.638 50 jet ski engines.

The pistons in this kit are meticulously crafted using high-quality materials to ensure superior durability and longevity. Each piston undergoes a rigorous manufacturing process that includes precise machining and thorough inspection to meet the highest industry standards.

The piston tops are engineered with an optimized dome shape, providing excellent combustion efficiency and power output. The piston skirts feature a proper clearance to the cylinder wall, enabling a snug, yet smooth sliding action for minimal friction and wear.

The piston pin bore is precision-machined to ensure a perfect fit with the piston pin, while the piston rings are designed to provide an efficient seal between the piston and cylinder walls to minimize compression loss and improve engine performance.

This piston kit includes all necessary components for a complete piston replacement, including pistons, piston pins, piston rings, and ring end gaps. Each component is carefully packaged to prevent damage during shipping and to ensure a seamless installation process.

By upgrading your Yamaha Jet 40 engine with the Core-Parts 100-252K piston kit, you can restore lost power, improve engine efficiency, and extend the life of your jet ski engine.

In summary, the Core-Parts 100-252K piston kit is an essential upgrade for Yamaha Jet 40 engines produced between 1991 and 2001. With its high-quality materials, optimized design, and complete set of components, this piston kit is the perfect choice for ensuring top performance and longevity of your jet ski engine.

Core-Parts 100-252k Piston Kit for 1989-2008 Yamaha Jet 40: A Detailed Analysis

The Core-Parts 100-252k piston kit is a popular aftermarket option for the maintenance and repair of Yamaha Jet 40 watercraft models produced between 1989 and 2008. In this analysis, we will discuss the advantages and disadvantages of purchasing this piston kit.

1. Cost-effective: Compared to OEM (Original Equipment Manufacturer) alternatives, aftermarket piston kits like Core-Parts often provide significant cost savings.

2. Quality: Core-Parts is a well-known and reputable aftermarket manufacturer, known for producing high-quality components.

3. Availability: Aftermarket parts like the Core-Parts piston kit are more readily available compared to OEM parts, as they are produced by multiple manufacturers.

4. Compatibility: The Core-Parts 100-252k piston kit is specifically designed for Yamaha Jet 40 watercraft models, ensuring a perfect fit and function.

1. Potential for Variability: Since aftermarket parts are manufactured by various companies, there may be slight variations in quality and fit.

2. Warranty: OEM parts typically come with longer or more comprehensive warranties compared to aftermarket parts.

3. Installation: Installing aftermarket parts may require more time and effort compared to OEM parts, as the installer must ensure a proper fit and function.

The Core-Parts 100-252k piston kit is an excellent choice for those looking to save costs on the maintenance or repair of their Yamaha Jet 40 watercraft models without sacrificing quality. While there may be slight variations in fit and function compared to OEM parts, the cost savings and availability make this aftermarket piston kit a worthwhile investment.

If you're in the market for a piston kit for your Yamaha Jet 40 watercraft model produced between 1989 and 2008, the Core-Parts 100-252k kit is an excellent option to consider. Its high-quality manufacturing, compatibility, and cost-effectiveness make it a popular choice among aftermarket alternatives.

Details:

Excellent performance: the piston is designed and manufactured with high precision can closely firth engine cylinder wall to ensure good sealing, reduce gas leakage, and improve the engines compression ratio combustion efficiency, thereby enhancing power output fuel economy. 1991 - 2001 Yamaha 3 cyl jet40. 1991 - 2001 Yamaha3 cyl jet 50. The various components in the kit cooperate with each other to ensure engines smooth operation, reduce engine vibration and noise, improve working efficiency service life.

1989 - 2008 Yamaha 3 cyl 2.638bore 50. Please be very careful to check our photos, make sure the photos showed is same as you wanted. After comprehensive quality assurance testing, it has high stability and consistency in quality, reducing engine failures and maintenance times caused by accessory issues. Package included: piston kit ,as shown in the figure.

1989 - 2008 Yamaha 3 cyl 2.638bore 40.

specifications watercraftimp:

• for makes: Yamaha
• for years: 1991–2001
• brand: Core-parts
• mpn: 100-252k
• part type: Jet Piston
• fitment type: Direct Replacement
• year: 1989, 1990, 1991, 1992, 1993, 1994, 1995
• year1: 1996, 1997, 1998, 1999, 2000, 2001, 2002
• material: Metal
• package size: 4 X 4 X 2 In
• features: Durable
• year2: 2003, 2004, 2005, 2006, 2007, 2008

offer watercraftimp:

• prices: $62.15–$190.28
• item condition: New
• best offers: true
• started: december 17, 2025
• sold #: 12
• in stock #: 5
• options: ship-to-home
• availability: in stock

general watercraftimp:

• category: Watercraft Parts > Engines > Impellers Components

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• rating: 99.2%
• city: chino,ca, hebron,ky, burlington,nj
• # reviews: 1187

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• policy: returns accepted
• time: 30 days

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• type: fixed
• class: economy, expedited