SKU:11-2207
The Keith Black KB263.060 piston set is a.060 oversize kit designed for a 3.438 inch bore, delivering a 9.0:1 compression ratio for Harley‑Davidson FL engines. It’s engineered for 1941–1950 FL models to restore power and reliability during rebuilds and restorations.
Manufactured in Mexico to strict standards, this kit is described as a 390 hypereutectic design with forged aluminum construction for durability and precise fit. The kit is sold as a complete overhaul set, including all necessary pistons and components for a full engine refresh. Proper installation is critical; run the engine at moderate speeds for at least 500 miles and avoid lugging in lower gears to properly break in the pistons and rings.
For installation guidance, refer to the detailed instructions included with the kit. To optimize performance and longevity, consider pairing with: the 11-1363 piston ring set, the Ring-O-Matic ring compressor tool kit, and the connecting rod clamping tool.
Upgrade your Harley Davidson FL series with the Keith Black KB263.060 piston set, designed specifically for 1941 to 1950 models. These high-quality pistons are engineered to deliver reliable performance and durability, making them an excellent choice for rebuilds and restorations. The set includes pistons with a.060 oversize, providing increased compression and power output for your vintage Harley. Constructed in Mexico, these pistons meet strict manufacturing standards to ensure a precise fit and long-lasting operation. Proper installation is critical; run the engine at moderate speeds for at least 500 miles and avoid excessive running in lower gears to properly break-in the new pistons and rings. For installation guidance, refer to the detailed instructions available at this link. The kit is sold as a set, including all necessary components for a complete overhaul. To ensure optimal performance, consider pairing this piston set with recommended accessories such as the 11-1363 piston ring set, the Ring-O-Matic ring compressor tool kit, and the connecting rod clamping tool. These accessory items facilitate proper installation and help achieve a reliable, efficient rebuild. Whether you're restoring a classic Harley or enhancing its performance, the Keith Black piston set provides a dependable solution that maintains the integrity of your vintage motorcycle.
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