{"product_id":"kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-10-5-1-005-824-01013","title":"Kb Pistons Hypereutectic Cast Piston - Pistons EVO 80ci 10.5:1 .005 — Harley-Davidson (1984-1999)","description":"\u003cp\u003eKB Pistons Hypereutectic cast piston for EVO 80ci engines at 10.5:1 compression, made with 16% silicon content for low thermal expansion and tight piston-to-wall clearance. Engineered for air-cooled engines running on pump fuel with reduced noise and wear compared to cast-iron designs.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e16% silicon hypereutectic alloy\u003c\/li\u003e\n  \u003cli\u003eLow thermal expansion rate\u003c\/li\u003e\n  \u003cli\u003eTight piston-to-cylinder wall clearance\u003c\/li\u003e\n  \u003cli\u003e.005 in oversized\u003c\/li\u003e\n  \u003cli\u003eOptimal ring seal and reduced engine noise\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e KB Pistons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e KB266.005\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 800745061362\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 10.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 80 cubic inches (EVO)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOversized:\u003c\/strong\u003e .005 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4.6 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.65 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits air-cooled EVO 80ci engines with 10.5:1 compression ratio or lower running on pump fuel.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat compression ratio do these pistons support?\u003c\/h3\u003e\n\u003cp\u003eKB266.005 is rated for 10.5:1 compression or lower. Higher-compression applications require different KB piston sets.\u003c\/p\u003e\n\u003ch3\u003eWhy are hypereutectic pistons better for air-cooled engines?\u003c\/h3\u003e\n\u003cp\u003eThe 16% silicon content reduces thermal expansion, allowing tighter piston-to-wall clearance, which improves ring seal, quiets engine operation, and decreases wear.\u003c\/p\u003e\n\u003ch3\u003eCan I run these on premium fuel?\u003c\/h3\u003e\n\u003cp\u003eThese pistons are engineered for pump fuel (87–91 octane). Premium fuel is not required and provides no benefit.\u003c\/p\u003e\n\u003ch3\u003eWhat does the .005 in oversized measurement mean?\u003c\/h3\u003e\n\u003cp\u003eThe piston is .005 inches larger in diameter than standard, requiring a matching honed cylinder bore to fit properly.\u003c\/p\u003e","brand":"Kb Pistons","offers":[{"title":"Default Title","offer_id":53035461181551,"sku":"824-01013","price":254.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/output_5e74a15d-0c2a-4a86-8945-710da4a1d12f.png?v=1779565566","url":"https:\/\/vtwinbikers.com\/products\/kb-pistons-hypereutectic-cast-piston-pistons-evo-80ci-10-5-1-005-824-01013","provider":"Vtwinbikers","version":"1.0","type":"link"}