SKU:11-2250
Upgrade your Harley Davidson XL Evolution engine with the Keith Black KB295.040 oversize piston set, engineered for 3.498 inch bore engines and 1988–1997 XL 1200cc models. The pistons use hypereutectic alloy designed for durability and heat resistance, cast in a permanent steel mold for precise manufacturing, and produced with a lightweight design to boost response and fuel efficiency.
Break-in guidance: run the engine at moderate speeds for at least 500 miles and avoid lugging or low gear operation to maximize longevity of the pistons and rings.
For installation ease, consider piston ring sets, ring compressor tools, and piston ring grinders as recommended accessories.
Keith Black flat top piston set is.040 oversize with a 8.9:1 compression ratio for 1988-up XL 1200cc Evolution models.Upgrade your Harley Davidson XL engine with the Keith Black 390 hypereutectic alloy piston set, designed for optimal performance and durability. Cast in a permanent steel mold, these pistons are expertly crafted to provide lightweight construction that enhances power output, fuel efficiency, and longevity. The.040 oversize pistons are compatible with 3.498-inch bore engines, making them an ideal choice for engine rebuilds or performance upgrades. The 9:1 compression ratio ensures a balanced mix of power and efficiency, while the low heat transfer alloy helps keep the piston skirts cool, minimizing expansion and wear over time. This combination of material properties and high compression ring placement reduces detonation risk, increases top ring temperature, and improves overall engine performance. Proper break-in procedures, including running the engine at moderate speeds for at least 500 miles and avoiding low gear operation, are recommended to maximize the lifespan of the new pistons and rings. The set includes all necessary components for installation, and detailed instructions are available for reference. Whether you're restoring an older model or enhancing your Harley’s engine, these pistons deliver reliable, high-quality performance. Compatible with models from 1988 to 1997, they are a valuable upgrade for enthusiasts seeking to improve engine efficiency and power output. The Keith Black pistons are proudly made in Mexico, ensuring quality craftsmanship. Accessories such as piston ring sets, ring compressor tools, and piston ring grinders are recommended to facilitate installation and optimize performance.
Features:
Couldn't load pickup availability
