Keith Black 11-2259 80 Inch Evolution Piston Kit.010 Oversize for Harley FXR

Upgrade your Harley Davidson FXR with the Keith Black 11-2259 80 Inch Evolution Piston Kit. The pistons are.010 oversize for a 3.498-inch bore and come with rings. Compression ratio is listed as 9.6:1, designed for a balance of performance and efficiency.

Crafted from hypereutectic alloy and cast in a permanent steel mold, these pistons emphasize durability and consistent quality. The alloy’s low heat transfer helps keep piston skirts cooler, reducing expansion and extending longevity under high-performance use.

Fitment and scope: Designed to fit Harley Davidson FXR models from 1984 to 1998, with compatibility also listed for related models in the same era. Specific model years covered include:

• FXR: 1984–1998
• FLST: 1986–1998
• FLT: 1984–1998
• FXD: 1991–1998
• FXST: 1984–1998

Part number KB305.010. This kit is described as an 80 Inch Evolution piston kit, intended for a.010 oversize build on a 3.498-inch bore.

Keith Black piston set.010 oversize and is for a 3.498 inch bore. Piston set has a compression ratio of 9.6:1 and includes rings.

Upgrade your Harley Davidson FXR engine with the Keith Black 11-2259 80 Inch Evolution Piston Kit. Crafted from hypereutectic alloy, these pistons are cast in a permanent steel mold to ensure durability and optimal performance. The kit features pistons that are.010 oversize, designed to fit a 3.498-inch bore, with a compression ratio of 9.5:1. The low heat transfer properties of the alloy help keep the piston skirts cool, minimizing expansion and enhancing longevity. This design promotes better power output and fuel efficiency, making it an excellent choice for performance enthusiasts looking to maximize their engine's potential.

Features:

• Material: Hypereutectic alloy with low heat transfer to reduce piston skirt temperatures

• Design:.010 oversize pistons for a 3.498-inch bore, optimized for high performance

• Compression Ratio: 9.5:1 for a balance of power and efficiency

• Construction: Cast in a durable steel mold for consistent quality and strength

• Application: Fits Harley Davidson FXR models from 1984 to 1993

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