SKU:11-2208
Keith Black 390 hypereutectic piston set in.070 oversize for a 3.438 inch bore delivers 9.0:1 compression, restoring displacement and power for Harley-Davidson FLH-FX models from 1941 to 1950.
Crafted in Mexico, these pistons are engineered with precision to ensure a proper fit and reliable engine function. The set includes all necessary components for a comprehensive rebuild, supporting a seamless installation.
Break-in guidance: run the engine at moderate speeds for at least 500 miles, avoiding excessive running in lower gears to allow the pistons and rings to seat properly. For installation details, refer to the official guide available online.
Compatibility: Harley Davidson FL models 1941 through 1950.
Design focus: durability and longevity to keep your engine performing reliably after installation.
Recommended accessories to support proper sealing and installation:
Specs and identifiers: Part number KB263.070; UOM: SET; Country of Origin: Mexico.
Keith Black 390 hypereutectic piston set is.070 oversize and is for 3.438 inch bore. Pistons have a compression of 9.0:1.Upgrade your vintage Harley Davidson with the Keith Black 74 Inch FLH-FX Piston Set in.070 oversize, designed to restore performance and reliability for models from 1941 to 1950. Crafted in Mexico, these pistons are engineered with precision to ensure a proper fit and optimal engine function. The set includes all necessary components for a comprehensive rebuild, providing a seamless installation process. Proper break-in is essential; run your engine at moderate speeds for at least 500 miles, avoiding excessive running in lower gears to ensure the pistons and rings seat correctly. For detailed installation instructions, refer to the official guide available online.
The pistons are compatible with a range of Harley Davidson FL models from 1941 through 1950, making them an ideal choice for restorers and enthusiasts aiming to maintain authentic performance. The design features are optimized for durability and longevity, ensuring your engine performs reliably after installation. To complement the pistons, suggested items include the 80-inch Shovelhead Piston Ring Set in.010, which helps achieve a proper seal and compression.
Accessory items such as the Ring-O-Matic Ring Compressor Tool Kit, Connecting Rod Clamping Tool, and other essential tools are recommended to facilitate a smooth installation process. These accessories help prevent damage during assembly and ensure precise fitting of pistons and rings. Trust Keith Black’s quality and craftsmanship to keep your vintage Harley running smoothly for years to come.
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