{"product_id":"keith-black-74-inch-flh-fx-piston-set-080-oversize-for-harley-davidson-fl-models","title":"Keith Black KB263.080 Piston Set.080 3.438 Bore Harley FL","description":"\u003cdiv\u003e\n\u003ch1\u003eKeith Black KB263.080 Piston Set –.080 Oversize for 3.438\" Bore Harley FL\u003c\/h1\u003e\n\u003cp\u003eKeith Black KB263.080 piston set is a.080 oversize option for a 3.438 inch bore, delivering a 9.0:1 compression ratio for Harley Davidson FL models from 1941 to 1950.\u003c\/p\u003e\n\u003cp\u003eManufactured in Mexico, these pistons are engineered for durability and proper fitment in vintage Harley engines during rebuilds or restoration projects.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFitment: Harley Davidson FL 1941–1950\u003c\/li\u003e\n\u003cli\u003eOversize:.080\u003c\/li\u003e\n\u003cli\u003eBore: 3.438 inches\u003c\/li\u003e\n\u003cli\u003eCompression: 9.0:1\u003c\/li\u003e\n\u003cli\u003eMade in Mexico\u003c\/li\u003e\n\u003cli\u003eIncludes all components for a complete piston replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBreak-in guidance is essential for longevity: run the engine at moderate speeds for at least 500 miles, and avoid excessive idling or running in low gears during this period. Follow the installation instructions online for correct assembly and optimal performance.\u003c\/p\u003e\n\u003cp\u003ePair this piston set with recommended accessories to simplify installation, such as the 80 inch Shovelhead Piston Ring Set.020, the Ring-O-Matic Ring Compressor Kit, and the Connecting Rod Clamping Tool.\u003c\/p\u003e\n\u003cp\u003eIdeal for rebuilds and restorations, the KB263.080 aims to restore vintage Harley performance and reliability in the FL lineup of the era.\u003c\/p\u003eKeith Black 390 hypereutectic piston set is.080 oversize and is for 3.438 inch bore. Pistons have a compression of 9.0:1.\n\u003cp\u003eThe Keith Black KB263.080 piston set is designed specifically for classic Harley Davidson FL models from 1941 to 1950, providing reliable performance with a.080 oversize bore. Crafted in Mexico, these pistons are engineered to restore engine power and efficiency in vintage Harley Davidson motorcycles. Constructed with precision, the set ensures proper fitment and durability, making it an excellent choice for rebuild projects or restoring vintage engines to their original performance standards.\u003cbr\u003eProper break-in is crucial for optimal piston and ring longevity. It is recommended to run the engine at moderate speeds for at least 500 miles, avoiding excessive idling or running in low gears during this period. Following the detailed installation instructions available online ensures correct assembly and optimal performance. The set includes all necessary components for a complete piston replacement, simplifying the rebuild process.\u003cbr\u003ePair this piston set with suggested accessories such as the 80 inch Shovelhead Piston Ring Set.020 and essential tools like the Ring-O-Matic Ring Compressor Kit and Connecting Rod Clamping Tool. These accessories facilitate a smooth installation process and help achieve the best results in your rebuild. Whether you're restoring an authentic vintage Harley or improving your engine's performance, the Keith Black pistons offer quality and reliability for your project.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eFitment: Designed for Harley Davidson FL models from 1941 to 1950\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eOversize:.080 for increased bore capacity and power\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eMaterial: Precision-engineered pistons made in Mexico for durability\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eInstallation: Includes detailed instructions for proper break-in and assembly\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eRecommended Usage: Suitable for rebuilds and restoration projects\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eAccessory Items: 16-0622 - Ring-O-Matic Ring Compressor Tool Kit, 16-0029 - Connecting Rod Clamping Tool, 60-0167\u003c\/li\u003e\u003c\/ul\u003e\n\u003cbr\u003e\nFitment:\u003cbr\u003e\nHarley Davidson FL 1941\u003cbr\u003e\nHarley Davidson FL 1942\u003cbr\u003e\nHarley Davidson FL 1943\u003cbr\u003e\nHarley Davidson FL 1944\u003cbr\u003e\nHarley Davidson FL 1945\u003cbr\u003e\nHarley Davidson FL 1946\u003cbr\u003e\nHarley Davidson FL 1947\u003cbr\u003e\nHarley Davidson FL 1948\u003cbr\u003e\nHarley Davidson FL 1949\u003cbr\u003e\nHarley Davidson FL 1950\u003cbr\u003e\nHarley Davidson FL 1951\u003cbr\u003e\nHarley Davidson FL 1952\u003cbr\u003e\nHarley Davidson FL 1953\u003cbr\u003e\nHarley Davidson FL 1954\u003cbr\u003e\nHarley Davidson FL 1955\u003cbr\u003e\nHarley Davidson FL 1956\u003cbr\u003e\nHarley Davidson FL 1957\u003cbr\u003e\nHarley Davidson FL 1958\u003cbr\u003e\nHarley Davidson FL 1959\u003cbr\u003e\nHarley Davidson FL 1960\u003cbr\u003e\nHarley Davidson FL 1961\u003cbr\u003e\nHarley Davidson FL 1962\u003cbr\u003e\nHarley Davidson FL 1963\u003cbr\u003e\nHarley Davidson FL 1964\u003cbr\u003e\nHarley Davidson FL 1965\u003cbr\u003e\nHarley Davidson FL 1966\u003cbr\u003e\nHarley Davidson FL 1967\u003cbr\u003e\nHarley Davidson FL 1968\u003cbr\u003e\nHarley Davidson FL 1969\u003cbr\u003e\nHarley Davidson FL 1970\u003cbr\u003e\nHarley Davidson FL 1971\u003cbr\u003e\nHarley Davidson FL 1972\u003cbr\u003e\nHarley Davidson FL 1973\u003cbr\u003e\nHarley Davidson FL 1974\u003cbr\u003e\nHarley Davidson FL 1975\u003cbr\u003e\nHarley Davidson FL 1976\u003cbr\u003e\nHarley Davidson FL 1977\u003cbr\u003e\nHarley Davidson FX 1971\u003cbr\u003e\nHarley Davidson FX 1972\u003cbr\u003e\nHarley Davidson FX 1973\u003cbr\u003e\nHarley Davidson FX 1974\u003cbr\u003e\nHarley Davidson FX 1975\u003cbr\u003e\nHarley Davidson FX 1976\u003cbr\u003e\nHarley Davidson FX 1977\u003c\/div\u003e","brand":"Keith Black","offers":[{"title":"Default Title","offer_id":44653158924330,"sku":"11-2209","price":203.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/11-2209.jpg?v=1785888240","url":"https:\/\/atticusgoods.com\/products\/keith-black-74-inch-flh-fx-piston-set-080-oversize-for-harley-davidson-fl-models","provider":"Atticus Goods","version":"1.0","type":"link"}