{"product_id":"wiseco-k1661-forged-010-oversize-9-1-compression-piston-kit-for-harley-davidson-xl","title":"Wiseco K1661 Forged .010 Oversize 9:1 Compression Piston Kit for Harley-Davidson XL","description":"Wiseco piston set is .010 oversize and has a compression of 9:1. Piston set includes Hasting X rings  2 wrist pins and 4 circlips.  Pistons are forged from high silicone alloy.\n\u003cp\u003eUpgrade the performance and durability of your Harley-Davidson XL engine with the Wiseco K1661 Forged .010 Oversize 9:1 Compression Piston Kit. Designed for select 1988–1997 Harley-Davidson XL models, this kit features a forged piston engineered for dependable operation and consistent performance. The .010-inch oversize specification is intended for properly machined cylinders, while the 9:1 compression ratio supports strong street-oriented power and responsive engine performance.\u003c\/p\u003e\n\u003cp\u003eProper installation and engine preparation are essential for achieving the best results from this Wiseco piston kit. Verify cylinder condition, piston-to-cylinder clearance, ring end gap, and all related fitment specifications before assembly. 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 piston and rings. Refer to the Wiseco Piston Installation Guide and Fitment instructions for application-specific procedures and technical requirements.\u003c\/p\u003e\n\u003cp\u003eThe Wiseco K1661 piston kit is supplied as a kit for engine rebuilding and performance applications. A compatible .010 oversize Evolution piston ring set, such as part number 11-9762, may be selected separately when required by the application. Additional installation tools, including a Ring-O-Matic ring compressor tool kit and connecting rod clamping tool, can help support accurate and efficient assembly. Confirm all components and clearances before installation to ensure compatibility with your engine build.\u003c\/p\u003e\n\u003cp\u003eThis forged 9:1 compression piston kit fits 1988 through 1997 Harley-Davidson XL applications. It is manufactured in the USA and is intended for builders seeking a reliable replacement or performance-oriented upgrade for a properly prepared engine. Always consult the vehicle service information and Wiseco instructions before installation.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: Wiseco\u003c\/li\u003e\n\u003cli\u003ePart Number: K1661\u003c\/li\u003e\n\u003cli\u003ePiston Type: Forged piston kit\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 9:1\u003c\/li\u003e\n\u003cli\u003eOversize: .010 inch\u003c\/li\u003e\n\u003cli\u003eApplication: Select 1988–1997 Harley-Davidson XL models\u003c\/li\u003e\n\u003cli\u003eUnit of Measure: Kit\u003c\/li\u003e\n\u003cli\u003eCountry of Origin: USA\u003c\/li\u003e\n\u003cli\u003eSuggested Item: 11-9762 - 3-1\/2-inch Evolution Piston Ring .010 Oversize\u003c\/li\u003e\n\u003cli\u003eAccessory Items: 16-0622 - Ring-O-Matic Ring Compressor Tool Kit, 16-0029 - Connecting Rod Clamping Tool, 60-0167, 11-9890 - Forged Standard 9:1 Compression Piston Kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment\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":"Wiseco","offers":[{"title":"Default Title","offer_id":44897033027626,"sku":"11-9891","price":418.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/11-9891.jpg?v=1790209943","url":"https:\/\/atticusgoods.com\/products\/wiseco-k1661-forged-010-oversize-9-1-compression-piston-kit-for-harley-davidson-xl","provider":"Atticus Goods","version":"1.0","type":"link"}