{"product_id":"keith-black-74-inch-flh-fx-piston-set-010-oversize-for-harley-davidson-fl-models","title":"Keith Black 74 Inch FLH-FX Piston Set.010 Oversize","description":"\u003cdiv\u003e\n\u003ch1\u003eKeith Black 74 Inch FLH-FX Piston Set.010 Oversize\u003c\/h1\u003e\n\u003cp\u003eEngineered for authentic restoration and performance upgrades, the Keith Black 74 Inch FLH-FX Piston Set in.010 oversize delivers a precise 3.438 in bore and a 9.0:1 compression ratio for Harley-Davidson FL models manufactured between 1941 and 1950.\u003c\/p\u003e\n\u003cp\u003eBuilt from forged aluminum for durability and heat resistance, these pistons are made in the USA. The kit is designed to fit early 1940s Harley FLs, enabling a restoration that preserves period aesthetics while enhancing engine operation.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRing-O-Matic Ring Compressor Tool Kit\u003c\/li\u003e\n\u003cli\u003eConnecting Rod Clamping Tool\u003c\/li\u003e\n\u003cli\u003ePiston rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eInstallation and break-in: Proper installation and break-in procedures are critical; run the engine at moderate speeds for at least 500 miles to seat the pistons and rings. For installation guidance, refer to the official instructions provided with the product.\u003c\/p\u003e\n\u003cp\u003ePart number KB263.010.\u003c\/p\u003eKeith Black 390 hypereutectic piston set is.010 oversize and is for 3.438 inch bore. Pistons have a compression of 9.0:1.\n\u003cp\u003eUpgrade your Harley Davidson FL with the Keith Black 74 inch FLH-FX piston set, designed to deliver reliable performance and precise fitment. Crafted in the USA, this set is ideal for restoring or enhancing vintage Harley models from 1941 to 1950. The pistons feature a durable construction that ensures longevity and efficient engine operation. Proper installation and break-in procedures are critical; run the engine at moderate speeds for at least 500 miles, avoiding excessive running in lower gears to properly seat the new pistons and rings. For installation guidance, refer to the official instructions available at \u003ca href=\"http:\/\/www.vtwinmfg.com\/Instructions\/MS\/KB%20Sym-Asym%20Piston%20Installation%20Guide.pdf\"\u003ethis link\u003c\/a\u003e. The package includes essential accessory items such as a Ring-O-Matic Ring Compressor Tool Kit, Connecting Rod Clamping Tool, and a set of oversize piston rings, ensuring you're fully equipped for a professional installation. The pistons are designed to fit Harley Davidson FL models from the early 1940s, providing an authentic restoration experience or a performance upgrade. With a focus on quality and precision, the Keith Black pistons are an excellent choice for mechanics and enthusiasts looking to maintain the classic Harley aesthetic while benefiting from modern performance enhancements.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eFitment: Compatible with 1941-1950 Harley Davidson FL models\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eMaterial: High-quality forged aluminum for durability and heat resistance\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eOversize:.010 inch for increased engine performance and bore size\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eCountry of Origin: Made in the USA for quality assurance\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eIncluded Accessories: Ring-O-Matic Ring Compressor Tool Kit, Connecting Rod Clamping Tool, and piston rings\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eInstallation Note: Run engine at moderate speeds for at least 500 miles during break-in period to ensure proper seating of pistons and rings\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":44653175111722,"sku":"11-2202","price":203.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/11-2202.jpg?v=1785889123","url":"https:\/\/atticusgoods.com\/products\/keith-black-74-inch-flh-fx-piston-set-010-oversize-for-harley-davidson-fl-models","provider":"Atticus Goods","version":"1.0","type":"link"}