{"product_id":"keith-black-kb297-040-80-inch-flh-fx-piston-set-040-oversize","title":"Keith Black KB297.040 80 Inch FLH-FX Piston Set .040 Oversize","description":"Keith Black piston set is .040 oversize and is for a 3.498″ inch bore. Piston set has a compression of 8.3:1 and includes rings.\n\u003cp\u003eThe Keith Black KB297.040 80 inch FLH-FX Piston Set .040 Oversize is made from a hypereutectic alloy cast in a permanent steel mold. This construction supports a lightweight piston design intended to make more power, use less fuel, and provide extended service life. The pistons are .040 oversize for a 3.498-inch bore and have a 9.5:1 compression ratio.\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 is intended to increase power and economy. High ring placement also helps reduce detonation and increases top ring temperature. This set fits 1978–1984 Harley-Davidson FL models and 1978–1980 Harley-Davidson FX models.\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. Refer to the Keith Black Symmetrical-Asymmetrical Piston Installation Guide for installation information.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand and Part Number: Keith Black KB297.040\u003c\/li\u003e\n\u003cli\u003eApplication: 80 inch FLH-FX piston set\u003c\/li\u003e\n\u003cli\u003eOversize: .040 oversize for a 3.498-inch bore\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 9.5:1\u003c\/li\u003e\n\u003cli\u003eMaterial: Hypereutectic alloy cast in a permanent steel mold\u003c\/li\u003e\n\u003cli\u003eHeat Management: Low heat transfer helps keep piston skirts cool and minimize expansion\u003c\/li\u003e\n\u003cli\u003eRing Placement: High compression ring placement is intended to increase power and economy, reduce detonation, and increase top ring temperature\u003c\/li\u003e\n\u003cli\u003eFitment: 1978–1984 Harley-Davidson FL and 1978–1980 Harley-Davidson FX models\u003c\/li\u003e\n\u003cli\u003eBreak-In: Run at moderate speeds for at least 500 miles and avoid excessive running in lower gears\u003c\/li\u003e\n\u003cli\u003eAccessory Items: 16-0622 - Ring-O-Matic Ring Compressor Tool Kit, 16-0029 - Connecting Rod Clamping Tool, 60-0167\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\nHarley Davidson FL  1978\u003cbr\u003e\nHarley Davidson FL  1979\u003cbr\u003e\nHarley Davidson FL  1980\u003cbr\u003e\nHarley Davidson FL  1981\u003cbr\u003e\nHarley Davidson FL  1982\u003cbr\u003e\nHarley Davidson FL  1983\u003cbr\u003e\nHarley Davidson FL  1984\u003cbr\u003e\nHarley Davidson FLT  1979\u003cbr\u003e\nHarley Davidson FLT  1980\u003cbr\u003e\nHarley Davidson FLT  1981\u003cbr\u003e\nHarley Davidson FLT  1982\u003cbr\u003e\nHarley Davidson FLT  1983\u003cbr\u003e\nHarley Davidson Fx  1978\u003cbr\u003e\nHarley Davidson Fx  1979\u003cbr\u003e\nHarley Davidson Fx  1980\u003cbr\u003e\nHarley Davidson Fx  1981\u003cbr\u003e\nHarley Davidson Fx  1982\u003cbr\u003e\nHarley Davidson Fx  1983\u003cbr\u003e\nHarley Davidson Fx  1984\u003cbr\u003e\nHarley Davidson FXR  1982\u003cbr\u003e\nHarley Davidson FXR  1983","brand":"Keith Black","offers":[{"title":"Default Title","offer_id":44583386710103,"sku":"11-2256","price":548.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/2276\/2583\/files\/11-2256.jpg?v=1793267692","url":"https:\/\/valleyspeed.net\/en-us\/products\/keith-black-kb297-040-80-inch-flh-fx-piston-set-040-oversize","provider":"The Speed Shop Canada","version":"1.0","type":"link"}