What does a derby cover gasket do?

The derby cover gasket seals the derby cover on your motorcycle's primary drive system. This prevents oil from leaking out and keeps dirt and debris from getting into the primary case.

Why is it important to replace the derby cover gasket?

A damaged or worn derby cover gasket can lead to oil leaks, which can cause low oil levels and potential engine damage. Replacing it ensures a proper seal and protects your primary components.

Does this gasket kit come with all the necessary hardware?

This product is for the derby cover gasket only. It does not include any bolts or other hardware, which you may need to reuse from your original cover or purchase separately.

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Twin Power 84-99 Big Twin Exc 99 Softail and Dyna models Derby Cover Gasket 5 Pk

Specifications

Brand: TwinPower
Part #: 043267
UPC: 887337318431

Twin Power 84-99 Big Twin Exc 99 Softail and Dyna models Derby Cover Gasket 5 Pk

Name: Twin Power 84-99 Big Twin Exc 99 Softail and Dyna models Derby Cover Gasket 5 Pk
Brand: TwinPower
Price: 41.97 USD
Availability: InStock

$41.97

On Backorder — Expected to ship by Apr 8, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Twin Power derby cover gasket 5 pack. Made in USA and replaces H-D® 25416-84.

Key Features

Fits many Harley-Davidson Big Twin models from 1984-1999 (excluding 1999 Softail and Dyna models).
Replaces H-D® part number 25416-84.
Comes in a convenient 5-pack.
Made in the USA.

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Will this fit your vehicle?

Product Details

These Twin Power derby cover gaskets are made in the USA and replace the H-D® 25416-84 part number. They're designed to shield your primary components, ensuring a solid seal for your engine.

This 5-pack is a practical choice for mechanics or riders who like to keep spares on hand. They fit a wide range of Harley-Davidson Big Twin models from 1984 through 1999, excluding 1999 Softail and Dyna models. This includes popular bikes like the Harley-Davidson FLHT Electra Glide Standard and the FLSTF Fat Boy, among many others.