{"product_id":"biglknm-primary-gasket-kit-for-harley-twin-cam-1999-2006-dyna-touring-full-seal-set-with-silicone-gasket-oil-mainshaft-seals","title":"BIGLKNM Primary Gasket Kit for Harley Twin Cam 1999–2006 Dyna\/Touring — Full Seal Set with Silicone Gasket \u0026 Oil\/Mainshaft Seals","description":"\u003cb\u003eBIGLKNM Primary Gasket Kit is a complete replacement seal set designed to restore a tight, leak-free primary cover on 1999–2006 Harley Twin Cam Dyna and Touring models.\u003c\/b\u003e\n\n\u003cp\u003eIf your Harley shows oil seepage from the primary cover or you’re doing a clutch or primary-service job, this kit supplies the seals and gaskets needed to rebuild the primary assembly to factory-style fit. The set includes the primary cover gasket, derby and inspection gaskets, an O-ring, oil and mainshaft seals, plus locating screw gaskets, all made to resist engine heat and oil exposure.\u003c\/p\u003e\n\n\u003ch3\u003eWhat parts are included and do they match OEM numbers?\u003c\/h3\u003e\n\u003cp\u003eThe kit contains every routine primary-seal component required for a full cover service: primary cover gasket, inspection cover gasket, derby cover gasket, O-ring, oil seal, mainshaft seal and two locating screw gaskets. The parts correspond to common OEM references to simplify fitment checks.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePrimary cover gasket and inspection cover gaskets for a complete seal\u003c\/li\u003e\n  \u003cli\u003eDerby cover gasket for clutch access and O-ring for tight mating\u003c\/li\u003e\n  \u003cli\u003eMainshaft and oil seals for rotating shafts\u003c\/li\u003e\n  \u003cli\u003eLocating screw gaskets to prevent fastener area leaks\u003c\/li\u003e\n  \u003cli\u003eReferenced OEM numbers: 12052A, 12066, 25416-99C, 34901-94(A\/B\/C), 34906-85(A\/B\/FM), 11147\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the material hold up under riding conditions?\u003c\/h3\u003e\n\u003cp\u003eBIGLKNM uses a ribbed silicone-based compound for the primary cover gasket and durable sealing materials for the oil and mainshaft seals. These materials are chosen for oil resistance and thermal stability so they maintain sealing performance through normal engine cycles and road conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRibbed silicone-style primary gasket for improved compression and seating\u003c\/li\u003e\n  \u003cli\u003eOil- and heat-resistant seals to withstand crankcase temperatures\u003c\/li\u003e\n  \u003cli\u003eFactory-style O-ring and screw gaskets to reduce leak paths\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this kit fit my Harley Dyna or Touring model?\u003c\/h3\u003e\n\u003cp\u003eThe kit is built for Harley-Davidson Twin Cam engine models from 1999 through 2006 — primarily Dyna and Touring families that share the same primary cover geometry. Always cross-check the listed OEM numbers and your bike’s year and engine type before purchase to ensure match.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible years: 1999–2006 Twin Cam engines\u003c\/li\u003e\n  \u003cli\u003eDesigned for Dyna and Touring models with corresponding primary cover layout\u003c\/li\u003e\n  \u003cli\u003eCompare part references on your service manual or existing gaskets prior to installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s included in the package and is installation straightforward?\u003c\/h3\u003e\n\u003cp\u003eThe box ships ready with all gaskets and seals needed for a standard primary cover rebuild, so you won’t need to source additional small parts. Installation follows typical primary-cover procedures; basic mechanical experience and the right torque specs are recommended to avoid leaks.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePackage includes: 1 O-ring, 1 oil seal, 1 mainshaft seal, 2 locating screw gaskets, 1 derby cover gasket, 1 primary cover gasket, 1 inspection cover gasket\u003c\/li\u003e\n  \u003cli\u003eInstallation requires primary cover removal, cleaning, and proper torqueing of fasteners\u003c\/li\u003e\n  \u003cli\u003eReplacement is best performed with service manual guidance or professional help\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Riders and home mechanics who own 1999–2006 Harley Twin Cam Dyna or Touring motorcycles and need a full primary cover seal replacement during routine maintenance, clutch work, or to stop oil seepage. The kit is aimed at people seeking an OEM-referenced, complete gasket set that covers all the common sealing points in the primary assembly, whether doing a DIY rebuild or preparing the bike for professional installation.\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: Does this kit fit Twin Cam Harleys from 1999–2006?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It's made for 1999–2006 Twin Cam Dyna and Touring models; verify OEM numbers against your bike before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are all seals included for a full primary cover service?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The package contains primary, derby, and inspection gaskets plus O-ring, oil and mainshaft seals, and locating screw gaskets.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BIGLKNM","offers":[{"title":"Default Title","offer_id":48085632909470,"sku":"B0C7H5ZK59","price":45.42,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/biglknm-primary-cover-front-view.jpg?v=1785875652","url":"https:\/\/northtrailauto.ca\/products\/biglknm-primary-gasket-kit-for-harley-twin-cam-1999-2006-dyna-touring-full-seal-set-with-silicone-gasket-oil-mainshaft-seals","provider":"North Trail Auto","version":"1.0","type":"link"}