{"product_id":"s-s-cycle-flywheels-harley-davidson","title":"S\u0026S Cycle Flywheels — Harley-Davidson Electra Glide, Softail Heritage Classic, Electra Glide Classic (1955-2026)","description":"\u003cp\u003eS\u0026amp;S Cycle flywheels are high-strength crankshaft assemblies built for Harley-Davidson performance engines, forged from heat-treated 4140 steel and balanced to exacting tolerances. Designed with Finite Element Analysis to handle extreme power and higher RPM while maintaining the reliability that made S\u0026amp;S the industry standard for over 60 years.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eHeat-treated 4140 material — harder and twice as strong as stock\u003c\/li\u003e\n  \u003cli\u003eFull-width wristpin design requires S\u0026amp;S Performance Pistons\u003c\/li\u003e\n  \u003cli\u003eBalanced for 1213g piston weight\u003c\/li\u003e\n  \u003cli\u003eEliminates need to weld crankpin on stronger assembly\u003c\/li\u003e\n  \u003cli\u003eCapable of sustained higher RPM operation\u003c\/li\u003e\n  \u003cli\u003e4-1\/2 inch stroke fits 114 or 128 cubic inch builds\u003c\/li\u003e\n  \u003cli\u003eBalance gear pre-installed\u003c\/li\u003e\n  \u003cli\u003ePrecision-machined and consistent across production\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e S\u0026amp;S Cycle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 320-0603\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 42.7 lb\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Drivetrain \/ Flywheels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eFits Harley-Davidson engines. Compatible with 114 and 128 cubic inch builds using the 4-1\/2 inch stroke configuration.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eDo I need S\u0026amp;S pistons to use these flywheels?\u003c\/h3\u003e\n\u003cp\u003eYes — the full-width wristpin design requires S\u0026amp;S Performance Pistons (1213g weight) for proper fit and balance.\u003c\/p\u003e\n\u003ch3\u003eCan I use these with a gear drive cam?\u003c\/h3\u003e\n\u003cp\u003eYes. These flywheels are designed to work with S\u0026amp;S gear drive cam systems for reliable high-RPM operation.\u003c\/p\u003e\n\u003ch3\u003eWhat displacement will these support?\u003c\/h3\u003e\n\u003cp\u003eWith the 4-1\/2 inch stroke, these flywheels work in 114 cubic inch and 128 cubic inch builds.\u003c\/p\u003e\n\u003ch3\u003eAre they balanced from the factory?\u003c\/h3\u003e\n\u003cp\u003eYes. They ship pre-balanced to the piston weight spec and include the balance gear, ready to install.\u003c\/p\u003e\n\u003ch3\u003eWhy use 4140 steel instead of stock material?\u003c\/h3\u003e\n\u003cp\u003e4140 is heat-treated to be twice as strong as OEM material, eliminating weak points and allowing safe higher-RPM operation without crankpin welding.\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":53040429695087,"sku":"T14-662047","price":1995.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/6734\/6543\/files\/b71d6bdcb0069bb4613b6c8b49431f23L.jpg?v=1777658955","url":"https:\/\/vtwinbikers.com\/products\/s-s-cycle-flywheels-harley-davidson","provider":"Vtwinbikers","version":"1.0","type":"link"}