{"product_id":"s-s-3-5-8-bore-piston-rings-020","title":"S\u0026S, 3-5\/8 bore piston rings. +.020\"","description":"\u003cp\u003e\u003c\/p\u003e\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eS\u0026amp;S chr\/moly replacement piston ring set. Fits all Evolution \u0026amp; pre-Evolution engines that are equipped with an S\u0026amp;S 3-5\/8\" big bore kit that have 1\/16\" (1.5mm) compression rings and 5\/32\" (4.2mm) oil rings. Will also fit other manufacturers 3-5\/8\" Big Bore kits (like some Axtell kits), that are equipped with the same piston grooves. \u003cbr\u003e\u003cbr\u003eStd cyl. bore: 3.625\" (92.075mm). \u003cbr\u003e\u003cbr\u003e1st ring: 1.5mm (.058\"). \u003cbr\u003e\u003cbr\u003e2nd ring: 1.5mm (.058\"). \u003cbr\u003e\u003cbr\u003eoil ring: 4.2mm (.155\"). \u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eNote compression ring gap: To determine the correct ring gap on your newly installed piston rings is very important. A too narrow gap may result in premature piston ring\/cylinder wall wear or even seizure, possibly breaking rings and\/or damage to pistons and\/or cylinder walls, and so on. A piston ring gap that is wider than necessary will result in needless compression loss and reduced engine efficiency.\u003cbr\u003e\u003cbr\u003eRecommended ring gap is .004\" per inch of cylinder diameter for street engines. For a 3-5\/8\" (3.625\") bore engine piston ring gap would be 3.625\" x .004\" = .0145\". \u003cbr\u003e\u003cbr\u003e(.0145\" x 25.4 = 0.3683mm or, when rounded of, 0.37mm). \u003cbr\u003e\u003cbr\u003eInformation provided by S\u0026amp;S Cycle, Inc.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\u003ctr\u003e\n\u003cth\u003eUnit\u003c\/th\u003e\n\u003ctd\u003e2CY\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/table\u003e\u003ch2\u003eFitment\u003c\/h2\u003e\u003cp\u003eMost S\u0026amp;S Evo \u0026amp; pre-Evo engines\u003c\/p\u003e\u003ch2\u003ePart numbers\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSupplier SKU\u003c\/th\u003e\n\u003ctd\u003e908669\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer part\u003c\/th\u003e\n\u003ctd\u003e94-1212X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":58633237397848,"sku":"908669","price":68.13,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0975\/8235\/0680\/files\/908440k_4a1440de-f8dd-495f-af50-bbf4c9ce1615.jpg?v=1791033423","url":"https:\/\/deathproofcycles.com\/products\/s-s-3-5-8-bore-piston-rings-020","provider":"Deathproof Cycles","version":"1.0","type":"link"}