Saihisday Primary Cover Gasket Kit for Harley-Davidson Twin Cam Touring 1999–2006 — Full Seal Set (replaces 34906-85FM)

Saihisday 34901-94 primary cover gasket kit is a complete replacement set engineered to restore a reliable oil seal for Harley-Davidson Street Glide, Road King, Road Glide and Electra Glide FLH/T Twin Cam bagger models from 1999–2006.

This full gasket and seal assortment replaces worn or damaged primary cover components so you can stop leaks, prevent contamination and maintain drivetrain performance. The kit includes gaskets, o-rings and oil seals that match OEM fitments (replaces 34906-85FM and related part numbers) and fits a wide range of FLH/T and touring models across model years 1999–2006 and Street Glide 2006. Designed for riders and DIY mechanics, the set focuses on sealing reliability, ease of fit and straightforward installation without special tools.

What parts are included and which OEM numbers does this kit replace?

The kit bundles every primary cover sealing component you need for a full gasket refresh, matching common OEM references so compatibility is easy to verify.

• Included: 1 O-ring, 1 oil seal, 1 mainshaft seal, derby cover gaskets, primary cover gaskets, inspection cover gaskets, and 2 locating screw gaskets.
• Replaces: 34901-94, 34901-94A/B/C, 34906-85A/B/FM, 11147, 12052A, 12066, 25416-99C.
• Fitment list: Street Glide (2006), Road King/Road Glide/Electra Glide/FLH-T Twin Cam bagger (1999–2006).

How does this gasket kit help stop oil leaks during regular riding?

The seals and gaskets are molded to maintain compression and block oil pathways that commonly develop leaks with aged or brittle components. Properly seated parts reduce seepage at mating surfaces and around rotating shafts.

• Engineered sealing surfaces to resist oil migration under vibration and heat.
• Mainshaft and oil seals designed for shaft clearance to limit blow-by and weeping.
• Inspection and derby gaskets restore flat sealing faces to prevent pooling and external leaks.

Is installation DIY-friendly and what tools will I need?

Yes — the kit is intended for owners who prefer to service their own bikes. The components are shaped for straightforward placement, but standard hand tools and attention to torque specs are recommended to ensure a correct seal.

• Typical tools: socket set, torque wrench, seal driver or suitable socket, gasket scraper, clean rags.
• No special proprietary tools required; replace seals carefully to avoid nicks or misalignment.
• Follow manufacturer torque values and clean mating surfaces before assembly for best results.

Will this kit fit my Harley model and how can I verify compatibility?

Compatibility covers many FLH/T touring and bagger models from 1999 through 2006 and Street Glide 2006; match your motorcycle’s year and primary cover part numbers to confirm fit. If your bike previously used any of the listed OEM numbers, this kit is a direct replacement candidate.

• Fitment examples: Road King, Road Glide, Electra Glide (1999–2006), Street Glide (2006).
• Cross-check OEM numbers such as 34906-85FM, 34901-94 and related variants for assurance.
• If unsure, compare the shapes and count of seals/gaskets in the kit to your removed components.

Who is this for: This Saihisday primary cover gasket kit is aimed at Harley-Davidson owners, independent mechanics and restoration enthusiasts who need a full primary seal refresh for late-1990s to mid-2000s FLH/T and touring bagger models. If you’re addressing leaks, rebuilding the primary or performing routine maintenance and want an OEM-replacement style kit with clear fitment coverage, this set supplies the common gaskets and seals needed for a professional-feeling repair without sourcing multiple parts separately.