{"product_id":"mcs908645","title":"Hastings 3-1\/2\" Bore Piston Ring Set. Chr\/Moly. Std – 1984–1999 Evo Big Twin; 1988–2003 XL…","description":"\u003ch2\u003eHastings 3-1\/2\" Bore Piston Ring Set. Chr\/Moly. STD – 1984–1999 Evo Big Twin; 1988–2003 XL…\u003c\/h2\u003e\n\u003cp\u003eStd cyl. bore: 3.4980\" (88.85 mm). 1st. ring: 1.6mm. 2nd ring: 1.6mm. oil ring: 4.0mm. Tech tip: Piston grooves vs piston rings. It''s not difficult to determine if a Hastings piston ring set will fit a certain piston. You should measure the height of the piston groove in the piston itself. The 2 top grooves will be for compression rings; the lower groove will be for the oil ring. In most cases Hastings oil rings are of the low tension 3-piece flex vent type. Ring heights are listed for reference. Tech tip: Piston oversizes. For each oversize cylinder diameter will increase with .010\" (0.254mm). The standard bore of the cylinder is listed for reference. (Information provided by Hastings Manufacturing Company; Inc.).\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e84-99 Evo Big Twin; 88-03 XL Sportster1200 (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Hastings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; PISTON RINGS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e 2CY\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 908645\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePart Numbers\u003c\/h2\u003e\n\u003cp\u003eMCS Part Number: 908645\u003cbr\u003eManufacturer Part Number: 2M6164000\u003cbr\u003eOEM Number: 21920-83\u003c\/p\u003e","brand":"Hastings","offers":[{"title":"Default Title","offer_id":57378317009283,"sku":"MCS908645","price":33.62,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/908440k.jpg?v=1785973336","url":"https:\/\/hogparts.co.uk\/products\/mcs908645","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}