{"product_id":"62402-performance-piston-kits-for-sportster","title":"Keith Black Pistons 8.2:1 Std Bore Sportster 1000Cc W \/ Pinstrument Locks Rings 3.188\"Std Bore Low Compression","description":"\u003ch1\u003ePERFORMANCE PISTON KITS FOR HARLEY DAVIDSON SPORTSTER\u003c\/h1\u003eWEIGHT: 2.51\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eSPAWNED FROM THIS SUCCESSFUL MANUFACTURER'S LINE OF AUTOMOTIVE PISTONS\u003c\/li\u003e\n\u003cli\u003eLIGHTWEIGHT , PERMANENT MOLD CAST PISTONS\u003c\/li\u003e\n\u003cli\u003eMANUFACTURED FROM HYPEREUTECTIC 390 ALLOY , CONTAIN 16-18% SILICON AND HEAT TREATED TO T6 SPECIFICATIONS PRODUCING A STRONGER THAN STOCK PISTON\u003c\/li\u003e\n\u003cli\u003eSPECIAL ALLOY COMPOSITION KEEPS HEAT CONFINED TO THE COMBUSTION CHAMBER AND REDUCES HEAT TRANSFER TO THE PISTON ITSELF PRODUCTION A COOLER RUNNING PISTON\u003c\/li\u003e\n\u003cli\u003ePISTON EXPANSION IS REDUCED BY AS MUCH AS 20% OVER CONVENTIONAL PISTONS\u003c\/li\u003e\n\u003cli\u003eLESS PISTON ROCK , BETTER RING SUPPORT , MORE DURABILITY , AND BETTER RETAINED COMPRESSION FOR MAXIMUM POWER\u003c\/li\u003e\n\u003cli\u003eTHE KEY FEATURE TO THESE PISTONS IS THE ACCUMULATOR GROOVE BETWEEN THE TIP AND SECOND RING WHICH AVERAGES THE NORMAL PRESSURE BETWEEN THE FIRST AND SECOND RING , KEEPING THE PRESSURE LOW ENOUGH TO PREVENT LIFTING OF THE TOP RING WHILE MAINTAINING PRELOAD ON THE SECOND (OIL SCRAPING) RING\u003c\/li\u003e\n\u003cli\u003eEACH SET OF PISTONS INCLUDES WRIST PINS , SPIRAL LOCKS , ENGINE ASSEMBLY LUBE , AND \u003cb\u003eHASTINGS\u003c\/b\u003e MOLY RINGS\u003c\/li\u003e\n\u003cli\u003eORDER \u003cb\u003e65199\u003c\/b\u003e FOR REPLACEMENT WRIST PIN LOCK (SOLD EACH)\u003c\/li\u003e\n\u003cli\u003eWRIST PINS MEASURE .792\" O.D.\u003c\/li\u003e\n\u003cli\u003eREPLACEMENT RINGS ARE AVAILABLE\u003cbr\u003e\u003cb\u003eKB PERFORMANCE PISTONS\u003c\/b\u003e\u003cbr\u003eFITS IRONHEAD SPORTSTER 1972\/1985 1000CC (61CI)\u003cbr\u003eSTANDARD BORE =3.188\"\u003cbr\u003e8.2:1 COMPRESSION RATIO DOME TOP PISTON\u003cbr\u003eSTANDARD BORE\u003cbr\u003e\u003cb\u003eNOTE:\u003c\/b\u003e IT IS NOT RECOMMENDED TO BORE 1972\/EARLY 1973 MODELS MORE THAN +.030\"                \u003cbr\u003eBY: KB PERFORMANCE PISTONS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MID-USA","offers":[{"title":"Default Title","offer_id":20200081981551,"sku":"62402","price":314.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0081\/7401\/0479\/products\/0079655_0_915ede84-4d27-42f4-9594-f1e4295cee01.jpg?v=1575385711","url":"https:\/\/www.widowmakersboneyard.com\/products\/62402-performance-piston-kits-for-sportster","provider":"Widowmaker's Boneyard","version":"1.0","type":"link"}