{"product_id":"keith-black-305-std-80-inch-evolution-piston-kit-for-harley-davidson-fxr","title":"Keith Black 305 STD 80 Inch Evolution Piston Kit For FXR","description":"\u003cdiv\u003e\n\u003ch1\u003eKeith Black 305 STD 80 Inch Evolution Piston Kit for FXR\u003c\/h1\u003e\n\u003cp\u003eUpgrade your Harley-Davidson FXR with the Keith Black 305 STD 80 inch Evolution Piston Kit. This standard-bore kit is designed for a 3.498-inch cylinder bore and delivers a 9.5:1 compression ratio for reliable power, efficiency, and longevity. Crafted from a high-performance hypereutectic alloy, the pistons are cast in a permanent steel mold to ensure uniformity and strength. The lightweight design increases power output and helps improve fuel economy, while low heat transfer keeps piston skirts cooler and maintains tighter clearances during operation.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003ePart number: KB305.STD\u003c\/li\u003e\n\u003cli\u003eMaterial: Hypereutectic alloy, cast in a permanent steel mold for strength and consistency\u003c\/li\u003e\n\u003cli\u003eCompression: 9.5:1, optimized for performance and longevity\u003c\/li\u003e\n\u003cli\u003eFitment: Standard bore 3.498 inches; Harley FXR models from 1984–1993\u003c\/li\u003e\n\u003cli\u003eDesign: High compression ring placement reduces detonation and raises top-ring temperature for improved efficiency\u003c\/li\u003e\n\u003cli\u003eIncludes: Piston rings; ring compressor kit and wrist pin ring tools included\u003c\/li\u003e\n\u003cli\u003eMade in Mexico\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eBreak-in is critical: run the engine at moderate speeds for at least 500 miles and avoid excessive low-gear operation to ensure proper seating of pistons and rings. Installation guidance is available online with the kit. This kit targets enthusiasts seeking a durable upgrade that balances power, efficiency, and long engine life.\u003c\/p\u003eKeith Black piston set is standard size and is for a 3.498 inch bore. Piston set has a compression of 9.6:1 and includes rings.\n\u003cp\u003eUpgrade your Harley Davidson FXR with the Keith Black 305.STD 80 inch Evolution Piston Kit, designed to enhance engine performance and durability. Crafted from the high-performance hypereutectic alloy, these pistons are cast in a permanent steel mold, ensuring uniformity and strength. The lightweight construction allows for more power output while improving fuel efficiency and extending engine life. Compatible with standard size bores of 3.498 inches, these pistons feature a 9.5:1 compression ratio, optimized for reliable performance. The low heat transfer properties of the alloy help keep the piston skirts cool, minimizing expansion and maintaining proper clearances during operation. This design, combined with high compression ring placement, boosts power output and fuel economy while reducing detonation risks. The high ring placement also increases the top ring temperature, further enhancing engine efficiency and longevity. Proper break-in procedures are critical; it is recommended to run the engine at moderate speeds for at least 500 miles, avoiding excessive low gear operation to ensure optimal piston and ring seating. For installation, refer to the detailed instructions available online. This kit is ideal for Harley Davidson FXR models from 1984 to 1993, providing a reliable upgrade for enthusiasts seeking improved performance and durability. The package includes essential accessory items such as a ring compressor kit and wrist pin ring tools to facilitate installation. Enhance your motorcycle’s performance with this high-quality piston kit from Keith Black, built to meet the demands of the most discerning riders.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eMaterial: Hypereutectic alloy cast in a permanent steel mold for strength and consistency\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eDesign: Lightweight piston for increased power and fuel efficiency\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eCompression Ratio: 9.5:1 optimized for performance and longevity\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eHeat Transfer: Low heat transfer alloy helps keep piston skirts cool, reducing expansion\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eRing Placement: High compression ring placement reduces detonation and enhances top ring temperature\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eFitment: Compatible with Harley Davidson FXR models from 1984 to 1993\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eInstallation: Includes essential accessory items such as a ring compressor and wrist pin ring tools\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eCountry of Origin: Made in Mexico\u003c\/li\u003e\u003c\/ul\u003e\n\u003cbr\u003e\nFitment:\u003cbr\u003e\nHarley Davidson FLST 1986\u003cbr\u003e\nHarley Davidson FLST 1987\u003cbr\u003e\nHarley Davidson FLST 1988\u003cbr\u003e\nHarley Davidson FLST 1989\u003cbr\u003e\nHarley Davidson FLST 1990\u003cbr\u003e\nHarley Davidson FLST 1991\u003cbr\u003e\nHarley Davidson FLST 1992\u003cbr\u003e\nHarley Davidson FLST 1993\u003cbr\u003e\nHarley Davidson FLST 1994\u003cbr\u003e\nHarley Davidson FLST 1995\u003cbr\u003e\nHarley Davidson FLST 1996\u003cbr\u003e\nHarley Davidson FLST 1997\u003cbr\u003e\nHarley Davidson FLST 1998\u003cbr\u003e\nHarley Davidson FLT 1984\u003cbr\u003e\nHarley Davidson FLT 1985\u003cbr\u003e\nHarley Davidson FLT 1986\u003cbr\u003e\nHarley Davidson FLT 1987\u003cbr\u003e\nHarley Davidson FLT 1988\u003cbr\u003e\nHarley Davidson FLT 1989\u003cbr\u003e\nHarley Davidson FLT 1990\u003cbr\u003e\nHarley Davidson FLT 1991\u003cbr\u003e\nHarley Davidson FLT 1992\u003cbr\u003e\nHarley Davidson FLT 1993\u003cbr\u003e\nHarley Davidson FLT 1994\u003cbr\u003e\nHarley Davidson FLT 1995\u003cbr\u003e\nHarley Davidson FLT 1996\u003cbr\u003e\nHarley Davidson FLT 1997\u003cbr\u003e\nHarley Davidson FLT 1998\u003cbr\u003e\nHarley Davidson FXD 1991\u003cbr\u003e\nHarley Davidson FXD 1992\u003cbr\u003e\nHarley Davidson FXD 1993\u003cbr\u003e\nHarley Davidson FXD 1994\u003cbr\u003e\nHarley Davidson FXD 1995\u003cbr\u003e\nHarley Davidson FXD 1996\u003cbr\u003e\nHarley Davidson FXD 1997\u003cbr\u003e\nHarley Davidson FXD 1998\u003cbr\u003e\nHarley Davidson FXR 1984\u003cbr\u003e\nHarley Davidson FXR 1985\u003cbr\u003e\nHarley Davidson FXR 1986\u003cbr\u003e\nHarley Davidson FXR 1987\u003cbr\u003e\nHarley Davidson FXR 1988\u003cbr\u003e\nHarley Davidson FXR 1989\u003cbr\u003e\nHarley Davidson FXR 1990\u003cbr\u003e\nHarley Davidson FXR 1991\u003cbr\u003e\nHarley Davidson FXR 1992\u003cbr\u003e\nHarley Davidson FXR 1993\u003cbr\u003e\nHarley Davidson FXR 1994\u003cbr\u003e\nHarley Davidson FXST 1984\u003cbr\u003e\nHarley Davidson FXST 1985\u003cbr\u003e\nHarley Davidson FXST 1986\u003cbr\u003e\nHarley Davidson FXST 1987\u003cbr\u003e\nHarley Davidson FXST 1988\u003cbr\u003e\nHarley Davidson FXST 1989\u003cbr\u003e\nHarley Davidson FXST 1990\u003cbr\u003e\nHarley Davidson FXST 1991\u003cbr\u003e\nHarley Davidson FXST 1992\u003cbr\u003e\nHarley Davidson FXST 1993\u003cbr\u003e\nHarley Davidson FXST 1994\u003cbr\u003e\nHarley Davidson FXST 1995\u003cbr\u003e\nHarley Davidson FXST 1996\u003cbr\u003e\nHarley Davidson FXST 1997\u003cbr\u003e\nHarley Davidson FXST 1998\u003c\/div\u003e","brand":"Keith Black","offers":[{"title":"Default Title","offer_id":44653075234858,"sku":"11-2257","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/11-2257.jpg?v=1785884933","url":"https:\/\/atticusgoods.com\/products\/keith-black-305-std-80-inch-evolution-piston-kit-for-harley-davidson-fxr","provider":"Atticus Goods","version":"1.0","type":"link"}