SKU:11-2219
Keith Black 11-2219 Evolution flat-top piston kit is.020 oversize with an 8.6:1 compression ratio for 1984-up Big Twin Evolution Harley-Davidson FXR engines. The kit uses a hypereutectic alloy and a 3.498-inch bore to deliver a compact, high-strength piston designed for performance in stock and rebuilt motors.
Crafted with a permanent steel mold casting process, this lightweight piston improves engine power and fuel efficiency. Its low heat transfer properties help keep piston skirts cooler, reducing expansion and wear, while the high ring placement reduces detonation and raises top ring temperature for better durability during high-performance runs.
Proper break-in procedures are recommended, including running the engine at moderate speeds for at least 500 miles and avoiding excessive low-gear operation to seat the rings correctly.
The kit includes all necessary components for installation, but piston rings are not included; use Hastings ring # 2KB258.020 for optimal results. Accessories such as ring compressors and wrist pin ring tools are recommended for installation, and detailed instructions are available online for proper fitting and operation. Made in Mexico.
The Keith Black 11-2219 hypereutectic alloy piston kit is designed for optimal performance in Harley Davidson FXR models from 1984 to 1993. Crafted with a permanent steel mold casting process, this lightweight piston enhances engine power, improves fuel efficiency, and extends piston longevity. Its oversize diameter of 3.498 inches and a compression ratio of 8.5:1 make it a reliable upgrade for high-performance applications. The low heat transfer properties of the alloy help keep the piston skirts cool, reducing expansion and wear, while the high compression ring placement boosts power output and fuel economy. This design also minimizes detonation and increases the top ring temperature, contributing to better engine durability and performance. Proper break-in procedures are recommended, including running the engine at moderate speeds for at least 500 miles and avoiding excessive low gear operation to allow the piston rings to seat correctly. The kit includes all necessary components for installation, but piston rings are not included; use Hastings ring # 2KB258.020 for optimal results. Compatible with OEM parts and ideal for rebuilds or performance upgrades, this piston kit ensures durability and efficiency for your Harley FXR engine. Accessories such as ring compressors and wrist pin ring tools are recommended for installation, and detailed instructions are available online for proper fitting and operation.
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