SKU:11-2257
Upgrade your Harley-Davidson FXR with the Keith Black 305 STD 80 inch Evolution Piston Kit. This standard-bore kit is designed for a 3.498-inch cylinder bore and delivers a 9.5:1 compression ratio for reliable power, efficiency, and longevity. Crafted from a high-performance hypereutectic alloy, the pistons are cast in a permanent steel mold to ensure uniformity and strength. The lightweight design increases power output and helps improve fuel economy, while low heat transfer keeps piston skirts cooler and maintains tighter clearances during operation.
Break-in is critical: run the engine at moderate speeds for at least 500 miles and avoid excessive low-gear operation to ensure proper seating of pistons and rings. Installation guidance is available online with the kit. This kit targets enthusiasts seeking a durable upgrade that balances power, efficiency, and long engine life.
Keith Black piston set is standard size and is for a 3.498 inch bore. Piston set has a compression of 9.6:1 and includes rings.Upgrade your Harley Davidson FXR with the Keith Black 305.STD 80 inch Evolution Piston Kit, designed to enhance engine performance and durability. Crafted from the high-performance hypereutectic alloy, these pistons are cast in a permanent steel mold, ensuring uniformity and strength. The lightweight construction allows for more power output while improving fuel efficiency and extending engine life. Compatible with standard size bores of 3.498 inches, these pistons feature a 9.5:1 compression ratio, optimized for reliable performance. The low heat transfer properties of the alloy help keep the piston skirts cool, minimizing expansion and maintaining proper clearances during operation. This design, combined with high compression ring placement, boosts power output and fuel economy while reducing detonation risks. The high ring placement also increases the top ring temperature, further enhancing engine efficiency and longevity. Proper break-in procedures are critical; it is recommended to 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, refer to the detailed instructions available online. This kit is ideal for Harley Davidson FXR models from 1984 to 1993, providing a reliable upgrade for enthusiasts seeking improved performance and durability. The package includes essential accessory items such as a ring compressor kit and wrist pin ring tools to facilitate installation. Enhance your motorcycle’s performance with this high-quality piston kit from Keith Black, built to meet the demands of the most discerning riders.
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