{"product_id":"keith-black-kb272-040-883cc-conversion-piston-set-040-oversize","title":"Keith Black KB272 .040 883cc Conversion Piston Set, .040 Oversize","description":"Keith Black dish piston set is .040 oversize with a 9.0:1 compression ratio for 1986-up XL Evolution models.\n\u003cp\u003eThe Keith Black KB272 .040 883cc Conversion Piston Set is designed for compatible 1986–1995 Harley-Davidson XL applications. This set uses a 390 hypereutectic alloy cast in a permanent steel mold, allowing for a lightweight piston design intended to support increased power, improved fuel economy, and extended service life.\u003c\/p\u003e\u003cp\u003eThe pistons are .040 inch oversize for a 3.498-inch bore and feature a 9:1 compression ratio. The alloy’s low heat transfer helps keep the skirts cooler and minimizes piston expansion. High compression ring placement is intended to increase power and economy while reducing detonation and increasing top ring temperature.\u003c\/p\u003e\u003cp\u003eFor 2009-and-later XL 883 applications, the cylinders cannot be bored to 1200cc; separate purchase of 1200cc cylinders is required for use with this piston set. After installation, run the engine at moderate speeds for at least 500 miles and avoid excessive operation in lower gears to properly break in the new pistons and rings. The product is supplied as a set. Country of origin: Mexico.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand and Part Number: Keith Black KB272 .040\u003c\/li\u003e\n\u003cli\u003eApplication: 883cc conversion piston set for listed 1986–1995 Harley-Davidson XL applications\u003c\/li\u003e\n\u003cli\u003ePiston Size: .040 inch oversize for a 3.498-inch bore\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 9:1\u003c\/li\u003e\n\u003cli\u003ePiston Material: 390 hypereutectic alloy\u003c\/li\u003e\n\u003cli\u003eMold Construction: Cast in a permanent steel mold\u003c\/li\u003e\n\u003cli\u003eDesign: Lightweight construction with low heat transfer to help minimize piston expansion\u003c\/li\u003e\n\u003cli\u003eRing Placement: High compression ring placement intended to reduce detonation and increase top ring temperature\u003c\/li\u003e\n\u003cli\u003eBreak-In Requirement: Run at moderate speeds for at least 500 miles and avoid excessive running in lower gears\u003c\/li\u003e\n\u003cli\u003e2009-and-Later XL 883 Note: Separate purchase of 1200cc cylinders is required because 2009-and-later XL 883 cylinders cannot be bored to 1200cc\u003c\/li\u003e\n\u003cli\u003eUnit of Measure: Set\u003c\/li\u003e\n\u003cli\u003eCountry of Origin: Mexico\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\nHarley Davidson XL  1986\u003cbr\u003e\nHarley Davidson XL  1987\u003cbr\u003e\nHarley Davidson XL  1988\u003cbr\u003e\nHarley Davidson XL  1989\u003cbr\u003e\nHarley Davidson XL  1990\u003cbr\u003e\nHarley Davidson XL  1991\u003cbr\u003e\nHarley Davidson XL  1992\u003cbr\u003e\nHarley Davidson XL  1993\u003cbr\u003e\nHarley Davidson XL  1994\u003cbr\u003e\nHarley Davidson XL  1995\u003cbr\u003e\nHarley Davidson XL  1996\u003cbr\u003e\nHarley Davidson XL  1997\u003cbr\u003e\nHarley Davidson XL  1998\u003cbr\u003e\nHarley Davidson XL  1999\u003cbr\u003e\nHarley Davidson XL  2000\u003cbr\u003e\nHarley Davidson XL  2001\u003cbr\u003e\nHarley Davidson XL  2002\u003cbr\u003e\nHarley Davidson XL  2003\u003cbr\u003e\nHarley Davidson XL  2004\u003cbr\u003e\nHarley Davidson XL  2005\u003cbr\u003e\nHarley Davidson XL  2006\u003cbr\u003e\nHarley Davidson XL  2007\u003cbr\u003e\nHarley Davidson XL  2008\u003cbr\u003e\nHarley Davidson XL  2009\u003cbr\u003e\nHarley Davidson XL  2010\u003cbr\u003e\nHarley Davidson XL  2011\u003cbr\u003e\nHarley Davidson XL  2012\u003cbr\u003e\nHarley Davidson XL  2013\u003cbr\u003e\nHarley Davidson XL  2014\u003cbr\u003e\nHarley Davidson XL  2015\u003cbr\u003e\nHarley Davidson XL  2016\u003cbr\u003e\nHarley Davidson XL  2017\u003cbr\u003e\nHarley Davidson XL  2018\u003cbr\u003e\nHarley Davidson XL  2019\u003cbr\u003e\nHarley Davidson XL  2020\u003cbr\u003e\nHarley Davidson XL  2021\u003cbr\u003e\nHarley Davidson XL  2022\u003cbr\u003e\nHarley Davidson XL  2023\u003cbr\u003e\nHarley Davidson XL  2024\u003cbr\u003e\nHarley Davidson XL  2025\u003cbr\u003e\nHarley Davidson XL  2026","brand":"Keith Black","offers":[{"title":"Default Title","offer_id":44583417184343,"sku":"11-2233","price":549.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/2276\/2583\/files\/11-2233.jpg?v=1793268201","url":"https:\/\/valleyspeed.net\/products\/keith-black-kb272-040-883cc-conversion-piston-set-040-oversize","provider":"The Speed Shop Canada","version":"1.0","type":"link"}