WISECO 4725P4 Rear Cylinder Piston Kit Domed 80CI. .040 3.538

( Brand: Wiseco ), ( Manufacturer Part Number: 4725P4 ), ( Part Type: Cylinder Piston ), ( Make: Harley )

Review WISECO Rear Cylinder Piston Kit 80ci. Domed .040 Inch Oversize To 3.538 fits 2010

The WiseCo 4725P4 Rear Cylinder Piston Kit is an essential upgrade for Harley-Davidson motorcycles with an 80 cubic inch (1337 cm ) engine, specifically those with a domed piston design, 040 casting number, and 3.538-inch (9 cm) piston pin diameter. This kit is suitable for model years around 2004 and later.

Each piston in this kit is meticulously crafted with a domed design to ensure optimal combustion and power in your engine. The pistons are made from high-quality forged aluminum alloy, ensuring durability and reliability even under the most demanding riding conditions. The piston skirts are designed with a full-length, ribbed, and oil-cooled design to minimize friction and heat build-up, ensuring a long-lasting and efficient piston-to-cylinder seal.

The piston kit also includes new rear cylinder pistons, rings, and pin assemblies. The rings are made from heat-resistant, low-friction materials, ensuring a proper seal and preventing oil leakage. The piston pins are made from heat-treated chromoly steel, ensuring a strong connection between the piston and connecting rod.

The WiseCo 4725P4 Rear Cylinder Piston Kit is an excellent investment for Harley-Davidson riders looking to enhance the performance and longevity of their engine. This kit is backed by WiseCo's commitment to quality and customer satisfaction, ensuring a hassle-free installation and a smooth riding experience.

When it comes to installation, it is essential to follow the manufacturer's instructions carefully to ensure proper fitment and function. If you are unsure about the installation process, it may be best to consult a professional mechanic to ensure the job is done correctly. With the right tools and attention to detail, this piston kit can be installed in a few hours, allowing you to get back on the road and enjoy the improved performance of your Harley-Davidson motorcycle.

In summary, the WiseCo 4725P4 Rear Cylinder Piston Kit is a high-quality upgrade for Harley-Davidson motorcycles with an 80 cubic inch engine, featuring domed pistons, 040 casting number, and a 3.538-inch piston pin diameter. This kit includes new pistons, rings, and pin assemblies, ensuring optimal combustion and engine efficiency while enhancing durability and longevity. With careful installation, this piston kit can significantly improve the performance and riding experience of your Harley-Davidson motorcycle.

Wiseco 4725P4 Rear Cylinder Piston Kit (80ci, Domed 040 3.538 10) - Pros, Cons, and Conclusion

The Wiseco 4725P4 Rear Cylinder Piston Kit (80ci, Domed 040 3.538 10) is a popular choice for engine upgrades in various applications. In this analysis, we will outline the key advantages and potential drawbacks of purchasing this piston kit.

1. Enhanced Performance: The 80 cubic inch (ci) pistons offer increased displacement, which can lead to better power output and torque.

2. Improved Durability: Wiseco pistons are known for their high-quality materials and advanced designs, ensuring long-lasting performance in high-stress environments.

3. Domed Design: The domed piston design allows for better combustion efficiency, leading to improved power and fuel economy.

4. Customizable: The Wiseco 4725P4 kit is available in various sizes and configurations, allowing customers to choose the best option for their specific engine.

5. Lightweight: The pistons are engineered to be lightweight, reducing rotating mass and contributing to improved engine response.

1. Cost: The Wiseco 4725P4 piston kit is more expensive than OEM (original equipment manufacturer) pistons, which may be a barrier for some buyers.

2. Installation Complexity: Installing aftermarket pistons, such as the Wiseco 4725P4 kit, can be more complex than installing OEM pistons due to the need for additional clearances and adjustments.

3. Potential Clearance Issues: Some engine configurations may require additional clearance modifications to accommodate the larger pistons.

4. Custom Engine Building: The Wiseco 4725P4 piston kit is typically used in custom engine builds, which can be more time-consuming and expensive compared to using stock pistons.

The Wiseco 4725P4 Rear Cylinder Piston Kit (80ci, Domed 040 3.538 10) offers several advantages, including enhanced performance, improved durability, and customizability. However, it comes with potential drawbacks such as increased cost, installation complexity, and potential clearance issues.

Based on the information provided, it is recommended that this piston kit is best suited for those involved in custom engine builds seeking improved power and performance. If you are looking for a more cost-effective solution, consider exploring OEM pistons or alternative aftermarket options.

Details:

Any damage claims may be exchanged for the identical item only. Skirt coated. Sold as: Each. Oversize to 3.538in.

Domed .040in. Kits include: Forged piston, rings, cir clips, chrome piston pin. Wiseco, Rear Cylinder Piston Kit 80ci. No cylinder head modification required.

part #: 4725p4 prices

• $201.99-$300.00

specifications pistondon:

• for years: 2010
• brand: Wiseco
• mpn: 4725p4
• part type: Cylinder Piston
• make: Harley

seller pistondon:

• city: Loudon, Tennessee
• # reviews: 599948
• rating: 99.4%

offer pistondon:

• options: Ship-to-home
• availability: In Stock
• sold: 0
• started: November 23, 2025
• quantity: 1

returns pistondon:

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

shipping pistondon:

• service: Economy, Standard, Expedited
• cost: $0.00
• class: Economy, Standard, Expedited
• transit: 6-12 Days
• type: Fixed

payments pistondon:

• wallet: Apple-pay
• credit card: Diners-club
• other

general pistondon:

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

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