SKU:11-2255
Keith Black 390 hypereutectic 3.5 inch bore piston set with an 8.3:1 compression ratio and.030 oversize delivers increased displacement for Harley-Davidson FLH/FX models from 1978 to 1984. The piston alloy is cast in a permanent steel mold and the kit includes rings, providing a ready-to-install upgrade for engine rebuilds or performance-enhancement projects.
Designed specifically for 1978–1984 Harley Davidson FL and FX series, this piston set is manufactured in Mexico from high-quality materials to handle high-performance engine rebuilding demands. The.030 oversize boosts displacement while maintaining reliable combustion with a tight seal.
The set is compatible with the following Harley-Davidson model ranges to ensure a precise fit for vintage or custom builds: FL 1978–1984, FLT 1979–1983, FX 1978–1984, FXR 1982–1983. It includes pistons and rings and is intended to work with recommended rings and accessories for optimal fit.
Proper break-in is critical for maximum performance: run the engine at moderate speeds for at least 500 miles and avoid excessive idling or low-gear operation during the initial period. For installation guidance, refer to the product guide and recommended setup practices.
To facilitate installation, consider Ring-O-Matic Ring Compressor Tool Kit, Connecting Rod Clamping Tool, and other essential accessories for a smooth, accurate assembly.
The Keith Black 390 hypereutectic 3.5 inch bore piston set has a 8.3:1 compression ratio and is oversize.030. Piston set alloy is cast in a permanent steel mold and includes rings.Upgrade your Harley Davidson with the Keith Black 80 inch FLH-FX Piston Set in.030 oversize, designed specifically for models from 1978 to 1984. Crafted in Mexico, this high-quality piston set ensures reliable performance and durability for your motorcycle's engine rebuild or upgrade. The set includes all necessary components to restore or enhance your engine's power, allowing for smooth operation and optimal compression.
Proper installation and break-in are critical for maximum performance. It is recommended to run the engine at moderate speeds for at least 500 miles, avoiding excessive idling or running in lower gears during the initial break-in period. For detailed instructions, please refer to the provided guide at http://www.vtwinmfg.com/Instructions/MS/Piston Fitment.pdf. This piston set is compatible with a range of Harley Davidson models, including the FL and FX series from 1978 to 1984, ensuring a precise fit for your vintage or custom motorcycle.
Constructed with precision and quality materials, the Keith Black pistons feature a robust design that withstands high-performance demands. The set comes with features such as a tight seal for efficient combustion, and the.030 oversize allows for increased displacement and power output. To facilitate installation, accessory items like the Ring-O-Matic Ring Compressor Tool Kit, Connecting Rod Clamping Tool, and other essential components are recommended for a smooth and accurate assembly process.
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