SKU:11-2243
Keith Black dome piston set in.030 oversize for Harley-Davidson XL 1000cc engines. Cast in a permanent steel mold from a hypereutectic alloy, these pistons are engineered for high performance and durability in Harley Davidson XL engines.
Proper installation and break-in procedures are essential; run the engine at moderate speeds for at least 500 miles to ensure optimal piston and ring seating. This piston set offers a reliable upgrade for Harley Davidson XL owners seeking enhanced performance and durability for daily riding or performance applications.
Keith Black dome piston set is.030 oversize with a 8.2 compression ratio for 1972-1985 XL 1000cc models.The Keith Black 390 hypereutectic alloy piston set is engineered for high performance and durability in Harley Davidson XL engines. Cast in a permanent steel mold, these pistons are designed to deliver increased power, improved fuel efficiency, and extended longevity. With a.030 oversize fit for a 3.188-inch bore, the pistons feature a 9:1 compression ratio that optimizes engine output and efficiency. The low heat transfer characteristics of the alloy help keep the piston skirts cool, minimizing expansion and maintaining proper clearance under demanding conditions. This design enhances overall engine reliability and performance, especially during high-compression operations.
The high ring placement within these pistons plays a crucial role in reducing detonation and increasing the top ring temperature, which improves sealing and engine longevity. The combination of low heat transfer alloy and strategic ring placement results in better power delivery and fuel economy. These pistons are suitable for a wide range of Harley Davidson XL models from 1972 to 1981, ensuring a versatile fit for vintage motorcycle enthusiasts. Proper installation and break-in procedures are essential; it is recommended to run the engine at moderate speeds for at least 500 miles, avoiding excessive low-gear running to ensure optimal piston and ring seating. Instructional guidance is available at the manufacturer's website for proper fitment and installation.
Constructed in Mexico, this piston set includes accessories to facilitate installation, such as a ring compressor tool kit and connecting rod clamping tools. The set offers a reliable upgrade for Harley Davidson XL owners seeking enhanced performance and durability from their engines, whether for daily riding or performance applications. Proper maintenance and break-in are vital to maximize the benefits of these high-performance pistons, ensuring long-lasting, consistent engine operation.
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