Keith Black 11-2223 80 Inch Domed Evolution Piston Kit.005 Oversize for Harley FXR
The Keith Black 11-2223 80 Inch Domed Evolution Piston Kit is a.005 oversize set tailored for Harley-Davidson FXR Big Twin Evolution engines from 1984 to 1993. Each piston is cast from a hypereutectic alloy and produced in a permanent steel mold to ensure consistent quality and durable performance under demanding riding conditions.
- Bore compatibility: 3.498 inches with oversize pistons for a precise fit and sealed compression.
- Compression ratio: 10.5:1, delivering a balanced blend of power and efficiency for street and performance use.
- Material and construction: hypereutectic alloy designed for strength and reduced wear, with a low heat transfer profile to help keep skirts cooler during operation.
- Ring and detonation considerations: higher ring placement aimed at improving detonation resistance and managing top-ring temperature for sustained performance.
- Fitment and origin: designed for Harley-Davidson FXR models from 1984 to 1993 and suitable for 1984-up Evolution big twin engines; manufactured in Mexico.
- Installation guidance: includes installation instructions with emphasis on proper break-in to maximize longevity; kit includes all necessary components for installation, with optional accessories available separately (Ring-O-Matic Ring Compressor Tool Kit SKU 16-0622 and Wrist Pin Ring Tool SKU 16-0075).
Proper break-in procedures are recommended: run at moderate speeds for at least 500 miles and avoid prolonged low-gear operation to maximize piston longevity and performance.
Keith Black dome piston set is.005 oversize with a 10.5:1 compression ratio for 1984-up Big Twin Evolution models.
The Keith Black 11-2223 hypereutectic alloy piston kit is designed to enhance performance and durability for Harley Davidson FXR models from 1984 to 1993. Cast in a permanent steel mold, these pistons are lightweight yet strong, offering improved power output while promoting fuel efficiency. The.005 inch oversize pistons are specifically tailored for a 3.498-inch bore, ensuring a precise fit for optimal engine performance. With a compression ratio of 10.5:1, they deliver a balanced mix of power and efficiency.
The low heat transfer properties of the alloy keep piston skirts cooler during operation, reducing expansion and potential wear. High compression ring placement further enhances engine power and economy by increasing top ring temperature and reducing detonation risks. Proper break-in procedures, including running at moderate speeds for at least 500 miles and avoiding excessive low gear operation, are recommended to maximize piston longevity and performance.
Installation instructions are available at this link. This kit includes all necessary components, and accessories such as the Ring-O-Matic Ring Compressor Tool Kit (SKU 16-0622) and Wrist Pin Ring Tool (SKU 16-0075) can be purchased separately for ease of installation. Manufactured in Mexico, this piston kit is built to high standards, ensuring long-lasting durability and reliable performance in your Harley FXR engine.
Features:
- Hypereutectic alloy construction for strength and durability
- Cast in a permanent steel mold for consistent quality
- Oversized.005 inch pistons for precise fit in 3.498-inch bore
- Compression ratio of 10.5:1 for balanced power and efficiency
- Low heat transfer alloy keeps skirts cool, minimizing expansion
- High ring placement reduces detonation and increases top ring temperature
- Suitable for Harley Davidson FXR models from 1984 to 1993
- Includes installation instructions for proper break-in
Fitment:
Harley Davidson FLST 1986
Harley Davidson FLST 1987
Harley Davidson FLST 1988
Harley Davidson FLST 1989
Harley Davidson FLST 1990
Harley Davidson FLST 1991
Harley Davidson FLST 1992
Harley Davidson FLST 1993
Harley Davidson FLST 1994
Harley Davidson FLST 1995
Harley Davidson FLST 1996
Harley Davidson FLST 1997
Harley Davidson FLST 1998
Harley Davidson FLT 1984
Harley Davidson FLT 1985
Harley Davidson FLT 1986
Harley Davidson FLT 1987
Harley Davidson FLT 1988
Harley Davidson FLT 1989
Harley Davidson FLT 1990
Harley Davidson FLT 1991
Harley Davidson FLT 1992
Harley Davidson FLT 1993
Harley Davidson FLT 1994
Harley Davidson FLT 1995
Harley Davidson FLT 1996
Harley Davidson FLT 1997
Harley Davidson FLT 1998
Harley Davidson FXD 1991
Harley Davidson FXD 1992
Harley Davidson FXD 1993
Harley Davidson FXD 1994
Harley Davidson FXD 1995
Harley Davidson FXD 1996
Harley Davidson FXD 1997
Harley Davidson FXD 1998
Harley Davidson FXR 1984
Harley Davidson FXR 1985
Harley Davidson FXR 1986
Harley Davidson FXR 1987
Harley Davidson FXR 1988
Harley Davidson FXR 1989
Harley Davidson FXR 1990
Harley Davidson FXR 1991
Harley Davidson FXR 1992
Harley Davidson FXR 1993
Harley Davidson FXR 1994
Harley Davidson FXST 1984
Harley Davidson FXST 1985
Harley Davidson FXST 1986
Harley Davidson FXST 1987
Harley Davidson FXST 1988
Harley Davidson FXST 1989
Harley Davidson FXST 1990
Harley Davidson FXST 1991
Harley Davidson FXST 1992
Harley Davidson FXST 1993
Harley Davidson FXST 1994
Harley Davidson FXST 1995
Harley Davidson FXST 1996
Harley Davidson FXST 1997
Harley Davidson FXST 1998
