{"product_id":"keith-black-kb305-010-80-inch-evolution-piston-kit-010","title":"Keith Black KB305.010 80 Inch Evolution Piston Kit .010","description":"Keith Black piston set .010 oversize and is for a 3.498 inch bore. Piston set has a compression ratio of 9.6:1 and includes rings.\n\u003cp\u003eThe Keith Black KB305.010 80 inch Evolution Piston Kit .010 is designed for applications requiring a 3.498-inch bore and a 9.5:1 compression ratio. The hypereutectic alloy is cast in a permanent steel mold, supporting a lightweight piston design intended to deliver increased power, improved fuel economy, and extended service life.\u003c\/p\u003e\u003cp\u003eThe alloy's low heat transfer helps keep the skirts cooler and minimizes piston expansion. Combined with high compression ring placement, this design supports power and economy. High ring placement also helps reduce detonation and increases top-ring temperature.\u003c\/p\u003e\u003cp\u003eFor proper break-in, run the engine at moderate speeds for at least 500 miles and avoid excessive operation in lower gears. The kit is listed for 1984–1993 Harley-Davidson FXR applications. Keith Black part number KB305.010.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHypereutectic Alloy: Constructed from Keith Black hypereutectic alloy.\u003c\/li\u003e\n\u003cli\u003ePermanent Mold Casting: Cast in a permanent steel mold for a lightweight piston design.\u003c\/li\u003e\n\u003cli\u003eBore Size: .010 oversize for a 3.498-inch bore.\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 9.5:1 compression ratio.\u003c\/li\u003e\n\u003cli\u003eLow Heat Transfer: Helps keep the skirts cooler and minimize piston expansion.\u003c\/li\u003e\n\u003cli\u003eHigh Ring Placement: Supports increased power and economy, helps reduce detonation, and increases top-ring temperature.\u003c\/li\u003e\n\u003cli\u003eFitment: Fits 1984–1993 Harley-Davidson FXR models.\u003c\/li\u003e\n\u003cli\u003eUnit of Measure: Sold as a set.\u003c\/li\u003e\n\u003cli\u003eBreak-In Requirement: Run the engine at moderate speeds for at least 500 miles and avoid excessive running in lower gears to properly break in new pistons and rings.\u003c\/li\u003e\n\u003c\/ul\u003e\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","brand":"Keith Black","offers":[{"title":"Default Title","offer_id":44583378419799,"sku":"11-2259","price":409.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/2276\/2583\/files\/11-2259.jpg?v=1793267553","url":"https:\/\/valleyspeed.net\/en-gb\/products\/keith-black-kb305-010-80-inch-evolution-piston-kit-010","provider":"The Speed Shop Canada","version":"1.0","type":"link"}