Keith Black KB272.005 3.5in Bore Hypereutectic Piston Kit

Keith Black KB272.005 is a.005 oversize dish piston kit with a 9:1 compression ratio, designed for 1986–1995 Harley Davidson XL engines displacing 883cc. Crafted from alloy cast hypereutectic material, these pistons are lighter yet durable, with low heat transfer that helps keep piston skirts cooler, minimizing expansion and wear for longer service life. Use with a 3.812-inch stroke and a dish head configuration to optimize combustion.

• Bore: 3.5 inches
• Compression: 9:1
• Material: Alloy cast hypereutectic design
• Includes: Hastings moly ring set
• Compatibility: Harley Davidson XL models from 1986 to 1995 with 883cc
• Manufactured in: Mexico
• Break-in: Run the engine at moderate speeds for at least 500 miles; follow the provided ring end gap instructions to prevent ring butting; second ring end gaps require no additional clearance
• Tools recommended: Ring-O-Matic ring compressor, connecting rod clamping tool, piston ring grinder
• Important note: 2009-UP XL 883 cylinders cannot be overbored to 1200cc; for those applications separate 1200cc cylinders are required

Keith Black dish piston set is.005 oversize with a 9.0:1 compression ratio for 1986-up XL Evolution models.

Upgrade your Harley Davidson XL engine with the Keith Black 272.005 hypereutectic piston kit, designed specifically for 1986-1995 models with 883cc displacement. Crafted from alloy cast in a permanent steel mold, these pistons offer a lightweight, durable solution that enhances engine performance. The 9:1 compression ratio optimizes power output, while the alloy's low heat transfer characteristics keep the piston skirts cool, minimizing expansion and wear for longer service life. This results in quieter operation, improved fuel efficiency, and increased horsepower.
The set includes a Hastings moly ring set, ensuring a proper seal and longevity. Use these pistons with a 3.812-inch stroke and a dish head configuration. Note that 2009-UP XL 883 cylinders cannot be overbored to 1200cc; for those applications, separate purchase of 1200cc cylinders is required. Proper break-in procedures are essential; run the engine at moderate speeds for at least 500 miles, avoiding excessive low gear acceleration to ensure the rings and pistons seat correctly. Follow the provided ring end gap instructions to prevent ring butting, with no additional clearance needed for the second ring end gaps.
This piston kit is ideal for enthusiasts seeking a reliable upgrade for Harley Davidson XL engines, combining innovative materials and precise engineering for optimal performance. The kit is manufactured in Mexico and is compatible with various accessory tools, including ring compressors, connecting rod clamps, and piston ring grinders, which are recommended for installation. Proper installation and break-in are critical to maximize the lifespan and performance gains of this piston set.

Features:

• Material: Alloy cast hypereutectic design for strength and durability

• Compression Ratio: 9:1 for increased power output

• Includes: Hastings moly ring set for optimal sealing

• Compatibility: Fits Harley Davidson XL models from 1986 to 1995 with 883cc engine

• Note: Use with 3.812 inch stroke and dish head configuration

• Manufactured in Mexico for quality assurance

• Proper break-in required: run engine at moderate speeds for at least 500 miles

• Tools Needed: Ring-O-Matic ring compressor, connecting rod clamping tool, piston ring grinder

• Tech Note: Follow ring end gap instructions to prevent ring butting; second ring gaps do not require extra clearance

Fitment:
Harley Davidson XL 1986
Harley Davidson XL 1987
Harley Davidson XL 1988
Harley Davidson XL 1989
Harley Davidson XL 1990
Harley Davidson XL 1991
Harley Davidson XL 1992
Harley Davidson XL 1993
Harley Davidson XL 1994
Harley Davidson XL 1995
Harley Davidson XL 1996
Harley Davidson XL 1997
Harley Davidson XL 1998
Harley Davidson XL 1999
Harley Davidson XL 2000
Harley Davidson XL 2001
Harley Davidson XL 2002
Harley Davidson XL 2003
Harley Davidson XL 2004
Harley Davidson XL 2005
Harley Davidson XL 2006
Harley Davidson XL 2007
Harley Davidson XL 2008
Harley Davidson XL 2009
Harley Davidson XL 2010
Harley Davidson XL 2011
Harley Davidson XL 2012
Harley Davidson XL 2013
Harley Davidson XL 2014
Harley Davidson XL 2015
Harley Davidson XL 2016
Harley Davidson XL 2017
Harley Davidson XL 2018
Harley Davidson XL 2019
Harley Davidson XL 2020
Harley Davidson XL 2021
Harley Davidson XL 2022
Harley Davidson XL 2023
Harley Davidson XL 2024
Harley Davidson XL 2025
Harley Davidson XL 2026