{"product_id":"wiseco-tracker-piston-kit-evo-flat-big-twin-1340-8-5-1-std-k0215ps","title":"Wiseco Tracker Flat Top 8.5:1 STD Piston Kit - Harley Evolution Big Twin","description":"\u003c!-- vt:seo-start --\u003e\n\u003cdiv class=\"vt-brand-bio\" style=\"background:#f6f6f6;border-left:4px solid #c8102e;padding:14px 18px;margin:0 0 20px;border-radius:4px;\"\u003e\n\u003ch2 style=\"margin:0 0 6px;font-size:1.05em;\"\u003eAbout Wiseco\u003c\/h2\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.6;\"\u003eWiseco has forged pistons in Mentor, Ohio since 1941, supplying everything from factory race teams to big-bore street builds. Forged construction is what lets a V-twin survive higher compression and more cylinder pressure than the stock cast piston was designed for.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"line-height:1.65;\"\u003eRestore the heart of your Evolution Big Twin with the Wiseco Tracker Flat Top Piston Kit. Designed for standard bore 1340cc engines, this kit ensures reliable performance and longevity. Each piston is forged for superior strength and features advanced coatings to reduce friction and wear.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eWhy riders pick this\u003c\/h3\u003e\u003cul style=\"padding-left:20px;margin:0 0 16px;\"\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForged flat top piston for Evolution Big Twin\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003e8.5:1 compression ratio for pump gas\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eStandard bore for factory spec rebuilds\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eArmorGlide skirt coating reduces friction\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eForce-fed pin oiling for enhanced durability\u003c\/li\u003e\n\u003cli style=\"margin:3px 0;\"\u003eIncludes precision rings for optimal sealing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis Wiseco Tracker Piston Kit is specifically engineered for Evolution Big Twin 1340cc engines, featuring a flat top design with an 8.5:1 compression ratio and standard bore. It's an ideal choice for riders looking to refresh their engine while maintaining factory specifications or for those undertaking a meticulous rebuild. The forged construction provides exceptional durability, ensuring these pistons can handle the demands of daily riding and light performance use.\u003c\/p\u003e\u003ch3\u003eOptimized for Street Reliability\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eForged piston crown with generous valve pockets for clearance\u003c\/li\u003e\n\u003cli\u003ePrecision-fit rings ensure ultimate sealing and consistent power\u003c\/li\u003e\n\u003cli\u003eForce-fed pin oiling for enhanced lubrication and durability\u003c\/li\u003e\n\u003cli\u003eArmorGlide skirt coating reduces friction and scuff resistance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Foundation for Your EVO Rebuild\u003c\/h3\u003e\u003cp\u003eMaintaining the standard bore size is often preferred for engines that haven't experienced significant cylinder wear, providing a direct replacement that meets original specifications. The 8.5:1 compression ratio is perfectly suited for pump gasoline, offering a balance of performance and fuel efficiency. Pair this piston kit with a comprehensive top-end gasket set for a complete and reliable Evolution Big Twin engine refresh.\u003c\/p\u003e\n\u003ch3 style=\"margin:20px 0 6px;\"\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Wiseco\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e K0215PS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e EVO Flat Big Twin 1340\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompression Ratio:\u003c\/strong\u003e 8.5:1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 9.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 4.87 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.75 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United States of America\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:22px 0 8px;\"\u003eCommon questions\u003c\/h3\u003e\u003cdiv class=\"vt-faq\"\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat compression ratio does this piston kit provide?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThese pistons are engineered for an 8.5:1 compression ratio, which is suitable for stock Evolution Big Twin engines and pump gas applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eIs a gasket kit included with this piston kit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eNo, gasket kits are sold separately. You will need to purchase a complete top-end gasket set specific to your Evolution Big Twin.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 12px;\"\u003e\n\u003cp style=\"margin:0 0 3px;font-weight:600;\"\u003eWhat bore size is this piston kit?\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.6;\"\u003eThis kit features a standard bore size. Always measure your cylinder bore to confirm it's within standard specifications before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"vt-confidence\" style=\"border-top:1px solid #e5e5e5;margin:24px 0 0;padding:16px 0 0;font-size:0.92em;line-height:1.6;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOrdering from Vtwinbikers\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli\u003eBrand new, sourced through authorized US distribution — never used, never grey-market.\u003c\/li\u003e\n\u003cli\u003eNot sure it fits? Use \u003cstrong\u003eShop by Bike\u003c\/strong\u003e to filter by your year and model, or email us and we will confirm before you order.\u003c\/li\u003e\n\u003cli\u003eHarley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vtwinbikers.com\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Piston kits \u0026 Components\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/all\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Wiseco\",\"item\":\"https:\/\/vtwinbikers.com\/collections\/wiseco\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"Wiseco Tracker Flat Top 8.5:1 STD Piston Kit - Harley Evolution Big Twin\",\"item\":\"https:\/\/vtwinbikers.com\/products\/wiseco-tracker-piston-kit-evo-flat-big-twin-1340-8-5-1-std-k0215ps\"}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What compression ratio does this piston kit provide?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"These pistons are engineered for an 8.5:1 compression ratio, which is suitable for stock Evolution Big Twin engines and pump gas applications.\"}},{\"@type\":\"Question\",\"name\":\"Is a gasket kit included with this piston kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, gasket kits are sold separately. You will need to purchase a complete top-end gasket set specific to your Evolution Big Twin.\"}},{\"@type\":\"Question\",\"name\":\"What bore size is this piston kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This kit features a standard bore size. Always measure your cylinder bore to confirm it's within standard specifications before ordering.\"}}]}\u003c\/script\u003e\n\u003c!-- vt:seo-end --\u003e","brand":"Wiseco","offers":[{"title":"Default Title","offer_id":53035851382895,"sku":"K0215PS","price":295.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/a743-5c818a776c2db_5a3242d6-088b-4075-966a-f52210e241f6.jpg?v=1777529739","url":"https:\/\/vtwinbikers.com\/products\/wiseco-tracker-piston-kit-evo-flat-big-twin-1340-8-5-1-std-k0215ps","provider":"Vtwinbikers","version":"1.0","type":"link"}