{"product_id":"biglknm-primary-cover-gasket-kit-for-harley-davidson-twin-cam-1999-2006-dyna-fxd-fxst-flstf","title":"BIGLKNM Primary Cover Gasket Kit for Harley Davidson Twin Cam 1999-2006 – Dyna FXD FXST FLSTF","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eRefresh your Harley’s primary seal system with the BIGLKNM Primary Cover Gasket Kit, crafted for Touring models powered by the Twin Cam engine from 1999 through 2006. This kit bundles essential gaskets and seals to support a reliable primary cover area, making maintenance approachable for DIY riders and efficient for shop work on the road. By aligning with the original layout, it aims to simplify installation while delivering the peace of mind that comes with a complete gasket set.\u003c\/p\u003e\n\n\u003ch3\u003eWhat’s included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eO‑ring\u003c\/li\u003e\n  \u003cli\u003eOil seal\u003c\/li\u003e\n  \u003cli\u003eMainshaft seal\u003c\/li\u003e\n  \u003cli\u003e2 locating screw gaskets\u003c\/li\u003e\n  \u003cli\u003eDerby cover gasket\u003c\/li\u003e\n  \u003cli\u003ePrimary cover gasket\u003c\/li\u003e\n  \u003cli\u003eInspection cover gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDurable design and OEM compatibility\u003c\/h3\u003e\n\u003cp\u003eConstructed from ribbed silicone-style material to endure heat and vibration, this kit is designed as a direct replacement for the original primary cover gaskets. It references several OEM numbers to help with compatibility checks, including 12052A, 12066, 25416-99c, 34901-94, 34901-94A, 34901-94B, 34901-94C, 34906-85FM, 34906-85A, 34906-85B, and 11147. The goal is to offer a precise fit that supports a clean, even seal across the primary cover area.\n\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-durability silicone components resist compression over time\u003c\/li\u003e\n  \u003cli\u003eDirect OEM-style replacement for straightforward installation\u003c\/li\u003e\n  \u003cli\u003eComplete set minimizes the need for additional parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eReal-world use and benefits\u003c\/h3\u003e\n\u003cp\u003eIdeal for routine maintenance, seasonal service, and longer rides, this gasket kit helps maintain a clean seal around the primary case. Outcomes can vary with riding conditions, but many riders report fewer leaks and consistent performance after a proper install.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSupports reliable primaries during hot days and cool starts\u003c\/li\u003e\n  \u003cli\u003eHelps prevent seepage around the derby and inspection covers\u003c\/li\u003e\n  \u003cli\u003eComprehensive kit simplifies ordering and installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy choose BIGLKNM\u003c\/h3\u003e\n\u003cp\u003eBIGLKNM focuses on practical, motorcycle-ready components that pair clear fitment with durable materials. Choosing this kit provides a complete, ready-to-install solution backed by responsive customer support.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete kit with all required gaskets and seals\u003c\/li\u003e\n  \u003cli\u003eQuality materials designed for longevity\u003c\/li\u003e\n  \u003cli\u003eClear compatibility with popular Harley Touring Twin Cam models\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003ePlease verify that your model matches the description before purchasing. We’re committed to helping with accurate fitment and friendly support for every order.\u003c\/p\u003e\n\n\u003ch3\u003eCare tips\u003c\/h3\u003e\n\u003cp\u003eAfter installation, inspect gasket surfaces, torque fasteners per service manual, and run the engine to verify seals. Regular checks help maintain a clean primary area during long trips or daily commuting.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What Harley models and years does this gasket kit fit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Compatible with Harley Touring Twin Cam models from 1999 to 2006, including Dyna FXD, FXST, and FLSTF variants.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What’s included in the kit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: O-ring, oil seal, mainshaft seal, two locating screw gaskets, derby cover gasket, primary cover gasket, and inspection cover gasket.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BIGLKNM","offers":[{"title":"Default Title","offer_id":42469090885717,"sku":"B0C7H5ZK59","price":42.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/biglknm-primary-cover-gasket-kit-harley-dyna-closeup.jpg?v=1778085157","url":"https:\/\/plentytorque.co.uk\/products\/biglknm-primary-cover-gasket-kit-for-harley-davidson-twin-cam-1999-2006-dyna-fxd-fxst-flstf","provider":"PlentyTorque","version":"1.0","type":"link"}