{"product_id":"mcs531781","title":"S\u0026S 3-7\/16\" Forged Stroker Piston Kit. +.090\" – 1941–1984 Big Twin with 84\" (4-1\/2\"…","description":"\u003ch2\u003eS\u0026amp;S 3-7\/16\" Forged Stroker Piston Kit. +.090\" – 1941–1984 Big Twin with 84\" (4-1\/2\"…\u003c\/h2\u003e\n\u003cp\u003eForged piston set. For 41-78 1200cc (74\") Knuckle; Panhead; Shovel and 1340cc Shovel. Fits engines with stroker flywheels and stock 3-7\/16\" (1200cc) or 3-1\/2\" (1340cc) cylinders with stock 5.330\" length. Compression will be approx 8.4:1 with 4-1\/2\" stroke; 9.4:1 with 4-5\/8 stroke and 10.8 with 4-3\/4\" stroke. Piston dome volume 50cc. The advanced alloy and piston skirt profile for low noise and long engine life. Pistons include wrist pins; wrist pin clips and piston rings. Note: +.060\" 3-7\/16\" bore of the 1200 engine is identical to the standard 3-1\/2\" bore of the 1340cc engine. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components; prior to installation. It is of importance that a knowledgeable mechanic will install \u0026amp; make adjustments as required. The rider must follow standard break-in and riding procedures for overhauled engines.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e41-84 Big Twin with 84\" (4-1\/2\" stroke); 86\" (4-5\/8\" stroke) \u0026amp; 88\" (4-3\/4\" stroke) engines (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e S\u0026amp;S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTONS AND RINGS KITS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e SET\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 531781\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePart Numbers\u003c\/h2\u003e\n\u003cp\u003eMCS Part Number: 531781\u003cbr\u003eManufacturer Part Number: 106-5782\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":44341763146048,"sku":"MCS531781","price":412.92,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/531778k.jpg?v=1776035432","url":"https:\/\/hogparts.co.uk\/products\/mcs531781","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}