{"product_id":"keith-black-390-hypereutectic-alloy-80-inch-evolution-piston-kit-030-for-harley-davidson-fxr","title":"Keith Black 390 Hypereutectic Piston Kit.030 FXR Harley","description":"\u003cdiv\u003e\n\u003ch1\u003eKeith Black 390 Hypereutectic Piston Kit.030 FXR Harley\u003c\/h1\u003e\n\u003cp\u003eUpgrade your Harley FXR with the Keith Black 390 hypereutectic piston kit, a.030 oversize set designed for a 3.498-inch bore.\u003c\/p\u003e\n\u003cp\u003eCrafted from a cast hypereutectic alloy, these pistons are built to deliver increased power, improved fuel efficiency, and longer-lasting performance. The kit uses a 9.5:1 compression ratio optimized for enhanced throttle response and efficient combustion, while the low heat transfer properties help keep piston skirts cooler during operation. High ring placement reduces detonation and elevates top-ring temperature to support more efficient combustion.\u003c\/p\u003e\n\u003cp\u003eSpecifications and compatibility:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOversize:.030 for a 3.498-inch bore\u003c\/li\u003e\n\u003cli\u003eCompression ratio: 9.5:1\u003c\/li\u003e\n\u003cli\u003eIncludes rings\u003c\/li\u003e\n\u003cli\u003eCast in Mexico\u003c\/li\u003e\n\u003cli\u003eFits Harley Davidson FXR models from 1984 to 1993\u003c\/li\u003e\n\u003cli\u003ePart number KB305.030\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNotes: Proper break-in is essential—run the engine at moderate speeds for at least 500 miles to seat the rings and pistons for longevity. For installation, refer to the online instructions and consider using Ring-O-Matic Ring Compressor Kit and Wrist Pin Ring Tool to facilitate a smooth install. This piston kit provides a durable upgrade to improve performance and efficiency.\u003c\/p\u003eKeith Black piston set is.030 oversize and is for a 3.498 inch bore. Piston set has compression ratio of 9.6:1 and includes rings.\n\u003cp\u003eUpgrade your Harley Davidson FXR with the Keith Black 390 hypereutectic alloy piston kit, part number KB305.030. Crafted from a cast hypereutectic alloy, these pistons are designed to deliver increased power, improved fuel efficiency, and longer-lasting performance. The pistons are.030 oversize, suitable for a 3.498-inch bore, and feature a 9.5:1 compression ratio to optimize engine performance. The low heat transfer properties of the alloy help keep the piston skirts cooler, minimizing expansion and enhancing durability during operation. This design also supports high compression ring placement, which not only boosts power and economy but also reduces detonation and raises the top ring temperature for efficient combustion. The pistons are cast in Mexico and are intended for use in specific Harley Davidson FXR models from 1984 to 1993, ensuring a precise fit for these engines. Proper break-in is essential; run the engine at moderate speeds for at least 500 miles, avoiding excessive lower gear operation to allow the piston rings and pistons to seat correctly and maximize longevity. For installation, consult the detailed instructions available online, and consider using recommended accessory tools like the Ring-O-Matic Ring Compressor Kit and Wrist Pin Ring Tool for a smooth installation process. This kit provides a reliable upgrade to improve your motorcycle's performance and efficiency with a durable, high-quality piston set.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eHypereutectic alloy construction for durability and heat resistance\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eOversize:.030 for a 3.498-inch bore compatibility\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eOptimized 9.5:1 compression ratio for enhanced power and fuel economy\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eLow heat transfer alloy maintains cooler piston skirts\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eHigh ring placement reduces detonation and increases ring temperature\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eCast in Mexico for quality assurance\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eDesigned for Harley Davidson FXR models from 1984 to 1993\u003c\/li\u003e\u003c\/ul\u003e\n\u003cbr\u003e\nFitment:\u003cbr\u003e\nHarley Davidson FLST 1986\u003cbr\u003e\nHarley Davidson FLST 1987\u003cbr\u003e\nHarley Davidson FLST 1988\u003cbr\u003e\nHarley Davidson FLST 1989\u003cbr\u003e\nHarley Davidson FLST 1990\u003cbr\u003e\nHarley Davidson FLST 1991\u003cbr\u003e\nHarley Davidson FLST 1992\u003cbr\u003e\nHarley Davidson FLST 1993\u003cbr\u003e\nHarley Davidson FLST 1994\u003cbr\u003e\nHarley Davidson FLST 1995\u003cbr\u003e\nHarley Davidson FLST 1996\u003cbr\u003e\nHarley Davidson FLST 1997\u003cbr\u003e\nHarley Davidson FLST 1998\u003cbr\u003e\nHarley Davidson FLT 1984\u003cbr\u003e\nHarley Davidson FLT 1985\u003cbr\u003e\nHarley Davidson FLT 1986\u003cbr\u003e\nHarley Davidson FLT 1987\u003cbr\u003e\nHarley Davidson FLT 1988\u003cbr\u003e\nHarley Davidson FLT 1989\u003cbr\u003e\nHarley Davidson FLT 1990\u003cbr\u003e\nHarley Davidson FLT 1991\u003cbr\u003e\nHarley Davidson FLT 1992\u003cbr\u003e\nHarley Davidson FLT 1993\u003cbr\u003e\nHarley Davidson FLT 1994\u003cbr\u003e\nHarley Davidson FLT 1995\u003cbr\u003e\nHarley Davidson FLT 1996\u003cbr\u003e\nHarley Davidson FLT 1997\u003cbr\u003e\nHarley Davidson FLT 1998\u003cbr\u003e\nHarley Davidson FXD 1991\u003cbr\u003e\nHarley Davidson FXD 1992\u003cbr\u003e\nHarley Davidson FXD 1993\u003cbr\u003e\nHarley Davidson FXD 1994\u003cbr\u003e\nHarley Davidson FXD 1995\u003cbr\u003e\nHarley Davidson FXD 1996\u003cbr\u003e\nHarley Davidson FXD 1997\u003cbr\u003e\nHarley Davidson FXD 1998\u003cbr\u003e\nHarley Davidson FXR 1984\u003cbr\u003e\nHarley Davidson FXR 1985\u003cbr\u003e\nHarley Davidson FXR 1986\u003cbr\u003e\nHarley Davidson FXR 1987\u003cbr\u003e\nHarley Davidson FXR 1988\u003cbr\u003e\nHarley Davidson FXR 1989\u003cbr\u003e\nHarley Davidson FXR 1990\u003cbr\u003e\nHarley Davidson FXR 1991\u003cbr\u003e\nHarley Davidson FXR 1992\u003cbr\u003e\nHarley Davidson FXR 1993\u003cbr\u003e\nHarley Davidson FXR 1994\u003cbr\u003e\nHarley Davidson FXST 1984\u003cbr\u003e\nHarley Davidson FXST 1985\u003cbr\u003e\nHarley Davidson FXST 1986\u003cbr\u003e\nHarley Davidson FXST 1987\u003cbr\u003e\nHarley Davidson FXST 1988\u003cbr\u003e\nHarley Davidson FXST 1989\u003cbr\u003e\nHarley Davidson FXST 1990\u003cbr\u003e\nHarley Davidson FXST 1991\u003cbr\u003e\nHarley Davidson FXST 1992\u003cbr\u003e\nHarley Davidson FXST 1993\u003cbr\u003e\nHarley Davidson FXST 1994\u003cbr\u003e\nHarley Davidson FXST 1995\u003cbr\u003e\nHarley Davidson FXST 1996\u003cbr\u003e\nHarley Davidson FXST 1997\u003cbr\u003e\nHarley Davidson FXST 1998\u003c\/div\u003e","brand":"Keith Black","offers":[{"title":"Default Title","offer_id":44653073694762,"sku":"11-2261","price":213.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/11-2261.jpg?v=1785884712","url":"https:\/\/atticusgoods.com\/products\/keith-black-390-hypereutectic-alloy-80-inch-evolution-piston-kit-030-for-harley-davidson-fxr","provider":"Atticus Goods","version":"1.0","type":"link"}