Syiono primary cover gasket kit for Harley Twin Cam seals the clutch area to prevent leaks.
Syiono O-ring 11147 included for reliable seal and oil containment.
Syiono oil seal 12052a ensures steady lubrication and leak protection.
Syiono mainshaft seal 12066 helps maintain clutch alignment and oil integrity.
Syiono derby gasket 25416-99c provides an accurate fit and leak prevention.
Syiono inspection gasket 34906-85fm ensures proper seal during inspection and maintenance.
Syiono primary gasket 34901-94 series helps seal the engine side for oil containment.
Syiono locating screw gasket 34901-94c ensures accurate alignment and secure fit.
Syiono primary cover gasket kit for Harley Twin Cam seals the clutch area to prevent leaks.
Syiono O-ring 11147 included for reliable seal and oil containment.
Syiono oil seal 12052a ensures steady lubrication and leak protection.
Syiono mainshaft seal 12066 helps maintain clutch alignment and oil integrity.
Syiono derby gasket 25416-99c provides an accurate fit and leak prevention.
Syiono inspection gasket 34906-85fm ensures proper seal during inspection and maintenance.
Syiono primary gasket 34901-94 series helps seal the engine side for oil containment.
Syiono locating screw gasket 34901-94c ensures accurate alignment and secure fit.

Syiono Primary Cover Gasket Kit for Harley-Davidson 1999-2006 Twin Cam – Clutch Seal Set

Overview The Syiono Primary Cover Gasket Kit is a comprehensive seal solution designed for Harley-Davidson Touring models...
Vendor: Syiono
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Syiono primary cover gasket kit for Harley Twin Cam seals the clutch area to prevent leaks.

Syiono Primary Cover Gasket Kit for Harley-Davidson 1999-2006 Twin Cam – Clutch Seal Set

£45.41
Syiono primary cover gasket kit for Harley Twin Cam seals the clutch area to prevent leaks.
Syiono O-ring 11147 included for reliable seal and oil containment.
Syiono oil seal 12052a ensures steady lubrication and leak protection.
Syiono mainshaft seal 12066 helps maintain clutch alignment and oil integrity.
Syiono derby gasket 25416-99c provides an accurate fit and leak prevention.
Syiono inspection gasket 34906-85fm ensures proper seal during inspection and maintenance.
Syiono primary gasket 34901-94 series helps seal the engine side for oil containment.
Syiono locating screw gasket 34901-94c ensures accurate alignment and secure fit.

Syiono Primary Cover Gasket Kit for Harley-Davidson 1999-2006 Twin Cam – Clutch Seal Set

£45.41
Description
Description
x

Overview

The Syiono Primary Cover Gasket Kit is a comprehensive seal solution designed for Harley-Davidson Touring models from 1999 to 2006 that use Twin Cam engines. Built as a direct replacement for the original gasket set, this kit aims to keep the clutch area in peak condition by supporting clean oil paths and consistent clutch operation through all riding conditions.

Riders value a well-sealed clutch cover as part of routine maintenance. This kit brings together essential gaskets and seals in a single, ready-to-install package, helping simplify service tasks and reduce the need to source parts individually. Each component is chosen to align with the original design, helping maintain precise fit and function as you service your bike.

Compatibility and Fit

In addition to the Harley-Davidson Touring lineup, this kit also covers Twin Cam variants often serviced alongside the core Touring models. The set’s parts are sized and shaped to match the factory components, supporting straightforward installation without improvisation.

Designed to seal the clutch cover and prevent leakage of oil or other fluids, the kit helps preserve clutch system integrity during and after maintenance. This can contribute to steadier oil levels and improved overall drivetrain reliability on long rides.

What’s Included

  • 11147 O-Ring
  • 12052A Oil Seal
  • 12066 Mainshaft Seal
  • 25416-99c Derby or Clutch Cover Gaskets
  • 34906-85FM/85A/85B Inspection Gasket
  • 34901-94/94A/94B/94C Primary Gasket and Locating Screw Gasket

Materials and Build

Crafted from high-quality materials, the kit emphasizes durability and a true OEM-style fit. The gasket and seal surfaces are designed to form reliable seals under varying temperatures and riding conditions, supporting consistent lubrication paths and minimizing the risk of leakage during operation.

Installation and Maintenance Tips

  • Prepare clean mating surfaces and replace all seals for a complete seal path.
  • Follow your vehicle’s service manual for torque recommendations and sequence during reassembly.
  • Store components in a clean area and inspect for any compatibility notes with related Harley variants.

Why Choose Syiono

Syiono focuses on practical, rider-first maintenance solutions. This gasket kit offers a consolidated, direct replacement option for the primary cover area, reducing downtime and helping you address potential oil leaks with a single purchase. While outcomes can vary by riding style and maintenance history, the kit provides the right parts to support proper clutch enclosure, lubrication pathways, and overall durability.

FAQ

Q: Is this gasket kit compatible with all Harley models?

A: Designed for 1999-2006 Touring models with Twin Cam engines; may fit some Dyna FXD/FXST variants.

Q: What does the kit include?

A: O-ring, oil seal, mainshaft seal, derby/cover gaskets, inspection gasket, primary gasket, and locating screw gasket.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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