Keith Black 11-2251 80 Inch FLH-FX Piston Set for Harley-Davidson

The Keith Black 11-2251 80 Inch FLH-FX Piston Set is designed for 1978–1984 Harley-Davidson FL and FX models, featuring a standard-size 3.5 inch bore and an 8.3:1 compression ratio. It uses a hypereutectic alloy and is cast in a permanent steel mold, with rings included for a complete upgrade.

• Engine compatibility: Fits 1978–1984 Harley-Davidson FL and FX models, including listed FXR and FLT variants for those years.
• Construction: High-quality piston set with symmetrical design for balanced operation; durable for restoration or performance upgrades.
• Materials and finish: Hypereutectic alloy, cast in a permanent steel mold; includes rings.
• Origin: Made in Mexico, with precision manufacturing to support durability and reliable operation.
• Part number: KB297.STD
• Recommended ring set: 11-1363 - 80 inch Shovelhead Piston Ring Set Standard
• Installation support: Detailed guidance available; includes recommended accessory tools such as Ring-O-Matic Ring Compressor Tool Kit (SKU 16-0622), Connecting Rod Clamping Tool (SKU 16-0029), and specialized Clamping Tool (SKU 60-0167).
• OEM alignment and performance: Engineered to meet or exceed OEM specifications for a seamless fit and efficient operation.
• Break-in guidance: Proper installation and break-in are crucial; run the engine at moderate speeds for at least 500 miles to allow pistons and rings to seat.
• Reference: Installation guide available at the provided official VTwin MFG link.

The Keith Black 390 hypereutectic 3.5 inch bore piston set has a 8.3:1 compression ratio and is standard size. Piston set alloy is cast in a permanent steel mold and includes rings.

Upgrade your Harley Davidson with the Keith Black 11-2251 80 Inch FLH-FX Piston Set Standard, designed specifically for models from 1978 to 1984. This piston set is crafted in Mexico with precision manufacturing to ensure durability and optimal performance. The set includes pistons built to fit Harley Davidson FL and FX models, providing a reliable upgrade for engine rebuilds or performance enhancements. These pistons are engineered to meet or exceed OEM specifications, ensuring a seamless fit and efficient operation within your motorcycle's engine.
Proper installation and break-in are crucial for maximizing performance and longevity. It is recommended to run the engine at moderate speeds for at least 500 miles, avoiding excessive running in lower gears to allow the new pistons and rings to properly seat. For detailed installation instructions, consult the official guide available at http://www.vtwinmfg.com/Instructions/MS/KB Sym-Asym Piston Installation Guide.pdf. This piston set is compatible with a suggested ring set, the 11-1363 80 inch Shovelhead Piston Ring Set Standard, to ensure optimal sealing and engine performance.
This kit includes all necessary components to complete your piston upgrade, along with recommended accessory items such as the Ring-O-Matic Ring Compressor Tool Kit (SKU 16-0622), the Connecting Rod Clamping Tool (SKU 16-0029), and the specialized Clamping Tool (SKU 60-0167). These tools facilitate proper installation, helping you achieve professional results. Constructed with high-quality materials, these pistons deliver enhanced durability and performance for your Harley Davidson motorcycle, making them a dependable choice for both restoration and performance upgrades.

Features:

• Engine Compatibility: Fits 1978-1984 Harley Davidson FL and FX models

• Material: High-quality piston construction for durability and performance

• Design: Symmetrical design for balanced operation

• Country of Origin: Made in Mexico for quality assurance

• Installation Support: Includes detailed instructions and recommended accessory tools

• Recommended Ring Set: 11-1363 - 80 inch Shovelhead Piston Ring Set Standard

Fitment:
Harley Davidson FL 1978
Harley Davidson FL 1979
Harley Davidson FL 1980
Harley Davidson FL 1981
Harley Davidson FL 1982
Harley Davidson FL 1983
Harley Davidson FL 1984
Harley Davidson FLT 1979
Harley Davidson FLT 1980
Harley Davidson FLT 1981
Harley Davidson FLT 1982
Harley Davidson FLT 1983
Harley Davidson FX 1978
Harley Davidson FX 1979
Harley Davidson FX 1980
Harley Davidson FX 1981
Harley Davidson FX 1982
Harley Davidson FX 1983
Harley Davidson FX 1984
Harley Davidson FXR 1982
Harley Davidson FXR 1983