{"product_id":"keith-black-390-hypereutectic-alloy-1000cc-piston-set-020-oversize-for-harley-davidson-xl","title":"Keith Black 390 Hypereutectic 1000cc Piston Set 020 Oversize Harley Davidson XL","description":"\u003cdiv\u003e\n\u003ch1\u003eKeith Black 390 Hypereutectic 1000cc Piston Set.020 Oversize for Harley-Davidson XL (1972-1985)\u003c\/h1\u003e\n\u003cp\u003eKeith Black dome piston set is.020 oversize for Harley-Davidson XL 1000cc engines from 1972 through 1985, with a bore of 3.188 inches. This kit is designed to boost power output and fuel efficiency while sustaining reliability under harsh riding conditions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHypereutectic alloy construction for strength and heat resistance\u003c\/li\u003e\n\u003cli\u003eCast in a permanent steel mold for precise dimensions\u003c\/li\u003e\n\u003cli\u003eLightweight design increases power and reduces fuel consumption\u003c\/li\u003e\n\u003cli\u003eLow heat transfer alloy keeps piston skirts cool, minimizing expansion\u003c\/li\u003e\n\u003cli\u003eHigh ring placement reduces detonation and enhances compression\u003c\/li\u003e\n\u003cli\u003e.020 oversize pistons designed for a 3.188 inch bore\u003c\/li\u003e\n\u003cli\u003eFits Harley-Davidson XL models 1972-1985\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary components for installation; comprehensive installation instructions available\u003c\/li\u003e\n\u003cli\u003ePistons proudly made in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProper break-in is essential; run at moderate speeds for at least 500 miles and avoid excessive low gear operation to ensure optimal piston and ring seating. This kit is intended for rebuilding or upgrading XL engines and supports durable performance for serious riders.\u003c\/p\u003eKeith Black dome piston set is.020 oversize with a 8.2 compression ratio for 1972-1985 XL 1000cc models.\n\u003cp\u003eUpgrade 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 feature a lightweight construction that enhances power output while reducing fuel consumption. With a bore size of 3.188 inches and a 9:1 compression ratio, they are engineered to deliver improved efficiency and longevity. The low heat transfer alloy keeps the piston skirts cool, minimizing expansion and maintaining proper clearance under load. This combination of materials and design increases power and fuel economy while ensuring reliable operation over time.\u003cbr\u003eThese pistons are.020 oversize, fitting engines with a bore of approximately 3.188 inches, making them ideal for rebuilding or upgrading Harley Davidson XL models from 1972 through 1981. The high ring placement reduces the risk of detonation and enables higher compression ratios, further boosting performance. Proper break-in is essential; running the engine at moderate speeds for at least 500 miles and avoiding excessive low gear operation will help ensure optimal piston and ring seating. Comprehensive installation instructions are available at the provided link, supporting a smooth replacement process.\u003cbr\u003eThis set includes all necessary components for installation, and additional accessory tools are recommended for optimal results. The Keith Black pistons are proudly made in the USA, guaranteeing quality and craftsmanship for your motorcycle rebuild or upgrade. Enhance your Harley Davidson XL's performance with these durable, high-quality pistons, designed for serious riders seeking reliable power and efficiency.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eHypereutectic alloy construction for strength and heat resistance\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eCast in a permanent steel mold for precise dimensions\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eLightweight design increases power and reduces fuel consumption\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eLow heat transfer alloy keeps piston skirts cool, minimizing expansion\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eHigh ring placement reduces detonation and enhances compression\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eFits Harley Davidson XL models from 1972 to 1981\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eIncludes.020 oversize pistons for improved bore fit\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eDesigned for optimal performance and longevity\u003c\/li\u003e\u003c\/ul\u003e\n\u003cbr\u003e\nFitment:\u003cbr\u003e\nHarley Davidson XL 1972\u003cbr\u003e\nHarley Davidson XL 1973\u003cbr\u003e\nHarley Davidson XL 1974\u003cbr\u003e\nHarley Davidson XL 1975\u003cbr\u003e\nHarley Davidson XL 1976\u003cbr\u003e\nHarley Davidson XL 1977\u003cbr\u003e\nHarley Davidson XL 1978\u003cbr\u003e\nHarley Davidson XL 1979\u003cbr\u003e\nHarley Davidson XL 1980\u003cbr\u003e\nHarley Davidson XL 1981\u003cbr\u003e\nHarley Davidson XL 1982\u003cbr\u003e\nHarley Davidson XL 1983\u003cbr\u003e\nHarley Davidson XL 1984\u003cbr\u003e\nHarley Davidson XL 1985\u003c\/div\u003e","brand":"Keith Black","offers":[{"title":"Default Title","offer_id":44653125107754,"sku":"11-2242","price":229.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/11-2242.jpg?v=1785885902","url":"https:\/\/atticusgoods.com\/products\/keith-black-390-hypereutectic-alloy-1000cc-piston-set-020-oversize-for-harley-davidson-xl","provider":"Atticus Goods","version":"1.0","type":"link"}