Keith Black 80 Inch Evolution Domed Piston Kit.030 for Harley FXR
Boost horsepower and durability on Harley FXR with the Keith Black.030 oversize Evolution domed piston kit, engineered for 1984–1993 Big Twin Evolution engines and delivering a 10.5:1 compression ratio.
- Hypereutectic alloy construction for strength and efficient heat transfer.
- Oversize.030 design fits a 3.498-inch bore.
- Compression ratio of 10.5:1 for increased horsepower and torque.
- Low heat transfer alloy keeps piston skirts cooler, reducing expansion and wear.
- High ring placement improves sealing, reduces detonation, and increases top ring temperature for durability.
- Lightweight cast in steel mold ensures consistent quality and performance.
- Part number KB266.030.
Fitment targets Harley-Davidson FXR models from 1984 to 1993, with a design optimized for Evolution-era performance upgrades. For installation guidance, refer to the provided instructions link. Break-in is essential: run the engine at moderate speeds for at least 500 miles, avoiding excessive low-gear operation to ensure proper piston and ring seating.
Keith Black dome piston set is.030 oversize with a 10.5:1 compression ratio for 1984-up Big Twin Evolution models.
The Keith Black KB266.030 hypereutectic alloy piston kit is engineered for high performance and durability in Harley Davidson FXR models from 1984 to 1993. Crafted using a permanent steel mold casting process, this lightweight piston enhances engine power while promoting fuel efficiency and longevity. The piston features a.030 oversize design to fit a 3.498-inch bore, with a compression ratio of 10.5:1 that optimizes power output and efficiency. Its unique alloy's low heat transfer properties help keep the piston skirts cooler, minimizing expansion and wear under demanding conditions. The high compression ring placement not only boosts power but also reduces detonation and increases ring temperature for better sealing and performance. Proper break-in is essential; run the engine at moderate speeds for at least 500 miles, avoiding excessive low gear operation to ensure optimal piston and ring seating. For installation guidance, refer to the provided instructions link. This piston kit is compatible with a range of FXR models, ensuring an easy upgrade for enthusiasts seeking enhanced performance and reliability in their Harley Davidson motorcycle.
Features:
- Hypereutectic alloy construction: Provides strength, durability, and efficient heat transfer.
- Oversize.030 design: Fits a 3.498-inch bore for precise engine matching.
- High compression ratio: 10.5:1 for increased horsepower and torque.
- Low heat transfer alloy: Keeps piston skirts cooler, reducing expansion and wear.
- High ring placement: Improves power, reduces detonation, and increases top ring temperature.
- Lightweight cast in steel mold: Ensures consistent quality and performance.
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
