{"product_id":"mcs531759","title":"S\u0026S 3-7\/16\" Bore 9:1cr Piston Kit. Std – 1941–1978 1200cc\/74\" Knuckle; Pan…","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eStandard replacement was 8:1 (46cc dome); these come with a 9:1 (57cc dome) compression ratio for a bit more oomph. S\u0026amp;S forged pistons with an advanced alloy and skirt profiles; resulting in a quiet engine and long life; previously only achievable with cast pistons. Used as replacement; with a higher compression ratio; for 1200cc (74\") Shovel; Pan and Knucklehead models. 3-7\/16\" bore with stock 3-31\/32\" stroke. Pistons include wrist pins; wrist pin clips and piston rings.Note: S\u0026amp;S piston fit recommendations: Close fit .0030\" to .0035\"; loose fit .004\" to .005\".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\u003cul\u003e\u003cli\u003e41-78 1200cc\/74\" Knuckle, Pan, Shovel (NU)\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\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 531759\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePart Numbers\u003c\/h2\u003e\u003cp\u003eMCS Part Number: 531759\u003cbr\u003eManufacturer Part Number: 106-5503\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":44341764292928,"sku":"MCS531759","price":493.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/531759k.jpg?v=1776035422","url":"https:\/\/hogparts.co.uk\/products\/mcs531759","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}